Zip Unicode C Reference Documentation

Zip

Current Version: 9.5.0.73

Zip compression component.

Create/Dispose

HCkZipW instance = CkZipW_Create();
// ...
CkZipW_Dispose(instance);
HCkZipW CkZipW_Create(void);

Creates an instance of the HCkZipW object and returns a handle ("void *" pointer). The handle is passed in the 1st argument for the functions listed on this page.

void CkZipW_Dispose(HCkZipW handle);

Objects created by calling CkZipW_Create must be freed by calling this method. A memory leak occurs if a handle is not disposed by calling this function. Also, any handle returned by a Chilkat "C" function must also be freed by the application by calling the appropriate Dispose method, such as CkZipW_Dispose.

Callback Functions

Callback Functions introduced in Chilkat v9.5.0.56
void CkZipW_setAbortCheck(HCkZipW cHandle, BOOL (*fnAbortCheck)(void));

Provides the opportunity for a method call to be aborted. If TRUE is returned, the operation in progress is aborted. Return FALSE to allow the current method call to continue. This callback function is called periodically based on the value of the HeartbeatMs property. (If HeartbeatMs is 0, then no callbacks are made.) As an example, to make 5 AbortCheck callbacks per second, set the HeartbeatMs property equal to 200.

void CkZipW_setPercentDone(HCkZipW cHandle, BOOL (*fnPercentDone)(int pctDone));

Provides the percentage completed for any method that involves network communications or time-consuming processing (assuming it is a method where a percentage completion can be measured). This callback is only called when it is possible to know a percentage completion, and when it makes sense to express the operation as a percentage completed. The pctDone argument will have a value from 1 to 100. For methods that complete very quickly, the number of PercentDone callbacks will vary, but the final callback should have a value of 100. For long running operations, no more than one callback per percentage point will occur (for example: 1, 2, 3, ... 98, 99, 100).

This callback counts as an AbortCheck callback, and takes the place of the AbortCheck event when it fires.

The return value indicates whether the method call should be aborted, or whether it should proceed. Return TRUE to abort, and FALSE to proceed.

void CkZipW_setProgressInfo(HCkZipW cHandle, void (*fnProgressInfo)(const wchar_t *name, const wchar_t *value));

This is a general callback that provides name/value information about what is happening at certain points during a method call. To see the information provided in ProgressInfo callbacks, if any, write code to handle this event and log the name/value pairs. Most are self-explanatory.

void CkZipW_setTaskCompleted(HCkZipW cHandle, void (*fnTaskCompleted)(HCkTaskW hTask));

Called in the background thread when an asynchronous task completes. (Note: When an async method is running, all callbacks are in the background thread.)

Properties

AbortCurrent
BOOL CkZipW_getAbortCurrent(HCkZipW cHandle);
void CkZipW_putAbortCurrent(HCkZipW cHandle, BOOL newVal);
Introduced in version 9.5.0.58

When set to TRUE, causes the currently running method to abort. Methods that always finish quickly (i.e.have no length file operations or network communications) are not affected. If no method is running, then this property is automatically reset to FALSE when the next method is called. When the abort occurs, this property is reset to FALSE. Both synchronous and asynchronous method calls can be aborted. (A synchronous method call could be aborted by setting this property from a separate thread.)

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AppendFromDir
void CkZipW_getAppendFromDir(HCkZipW cHandle, HCkString retval);
void CkZipW_putAppendFromDir(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_appendFromDir(HCkZipW cHandle);

When files are added to a Zip archive, they are appended from this directory. For example, to add all the files under c:/abc/123/myAppDir, this property could be set to "c:/abc/123", and "myAppDir/*" would be passed to AppendFiles. The path that is saved in the .zip would be "myAppDir/". (The value of the AppendFromDir property does not become part of the file path saved in the .zip.)

More Information and Examples
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AutoRun
void CkZipW_getAutoRun(HCkZipW cHandle, HCkString retval);
void CkZipW_putAutoRun(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_autoRun(HCkZipW cHandle);

(Relevant only when running on a Microsoft Windows operating system.) Optional when creating Windows-based self-extracting EXEs. This is the name of an executable contained within the to-be-created EXE that will automatically be run after extraction. (This is typically something like "setup.exe")

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AutoRunParams
void CkZipW_getAutoRunParams(HCkZipW cHandle, HCkString retval);
void CkZipW_putAutoRunParams(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_autoRunParams(HCkZipW cHandle);

(Relevant only when running on a Microsoft Windows operating system.) Command line parameters that get passed to the AutoRun executable.

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AutoTemp
BOOL CkZipW_getAutoTemp(HCkZipW cHandle);
void CkZipW_putAutoTemp(HCkZipW cHandle, BOOL newVal);

(Relevant only when running on a Microsoft Windows operating system.) This option applies to creating Windows-based self-extracting EXEs. If TRUE, the to-be-created EXE will automatically select and create a temporary directory for unzipping. This property is often used in conjunction with the AutoRun property to create a self-extracting EXE that automatically unzips to a temp directory and runs a setup.exe without interaction with the user.

Note: To create a self-extracting EXE with no user-interaction, set the following properties to these values:

ExeSilentProgress = FALSE
ExeNoInterface = TRUE
ExeFinishNotifier = FALSE

The default AutoTemp value is FALSE.

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CaseSensitive
BOOL CkZipW_getCaseSensitive(HCkZipW cHandle);
void CkZipW_putCaseSensitive(HCkZipW cHandle, BOOL newVal);

If TRUE then all methods that get or search for zip entries by name will use case-sensitive filename matching. If FALSE then filename matching will be case insensitive. Methods affected by this property include GetEntryByName, UnzipMatching, FirstMatchingEntry, etc.

The default value is FALSE.

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ClearArchiveAttribute
BOOL CkZipW_getClearArchiveAttribute(HCkZipW cHandle);
void CkZipW_putClearArchiveAttribute(HCkZipW cHandle, BOOL newVal);

Set this to TRUE to clear the FILE_ATTRIBUTE_ARCHIVE file attribute of each file during a zipping operation.

The default value is FALSE.

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ClearReadOnlyAttr
BOOL CkZipW_getClearReadOnlyAttr(HCkZipW cHandle);
void CkZipW_putClearReadOnlyAttr(HCkZipW cHandle, BOOL newVal);

If TRUE, the read-only attribute is automatically cleared when unzipping. The default value of this property is FALSE, which leaves the read-only attribute unchanged when unzipping.

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Comment
void CkZipW_getComment(HCkZipW cHandle, HCkString retval);
void CkZipW_putComment(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_comment(HCkZipW cHandle);

The global Zip file comment.

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DebugLogFilePath
void CkZipW_getDebugLogFilePath(HCkZipW cHandle, HCkString retval);
void CkZipW_putDebugLogFilePath(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_debugLogFilePath(HCkZipW cHandle);

If set to a file path, causes each Chilkat method or property call to automatically append it's LastErrorText to the specified log file. The information is appended such that if a hang or crash occurs, it is possible to see the context in which the problem occurred, as well as a history of all Chilkat calls up to the point of the problem. The VerboseLogging property can be set to provide more detailed information.

This property is typically used for debugging the rare cases where a Chilkat method call hangs or generates an exception that halts program execution (i.e. crashes). A hang or crash should generally never happen. The typical causes of a hang are:

  1. a timeout related property was set to 0 to explicitly indicate that an infinite timeout is desired,
  2. the hang is actually a hang within an event callback (i.e. it is a hang within the application code), or
  3. there is an internal problem (bug) in the Chilkat code that causes the hang.

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DecryptPassword
void CkZipW_getDecryptPassword(HCkZipW cHandle, HCkString retval);
void CkZipW_putDecryptPassword(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_decryptPassword(HCkZipW cHandle);

When opening a password-protected or AES encrypted Zip, this is the password to be used for decryption. Encrypted Zips may be opened without setting a password, but the contents cannot be unzipped without setting this password.

Note:The SetPassword method has the effect of setting both this property as well as the EncryptPassword property. The SetPassword method should no longer be used. It has been replaced by the DecryptPassword and EncryptPassword properties to make it possible to open an encrypted zip and re-write it with a new password.

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DiscardPaths
BOOL CkZipW_getDiscardPaths(HCkZipW cHandle);
void CkZipW_putDiscardPaths(HCkZipW cHandle, BOOL newVal);

If TRUE, discards all file path information when zipping. The default value is FALSE.

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Encryption
int CkZipW_getEncryption(HCkZipW cHandle);
void CkZipW_putEncryption(HCkZipW cHandle, int newVal);

Indicate whether the Zip is to be strong encrypted or not. Valid values are 0 (not encrypted) or 4 (AES encrypted). When this property is set to the value 4, WinZip AES compatible encrypted zip archives are produced.

Note: Prior to Chilkat v9.4.1, other possible values for this property were: 1 (blowfish), 2 (twofish), and 3 (rijndael). These settings originally provided a way to produce strong encrypted zips prior to when the AES encrypted Zip standard existed. Using these legacy values (1, 2, or 3) produced encrypted zips that only applications using Chilkat could read. Chilkat no longer supports these custom modes of encryption. If using an older version of Chilkat with one of these deprecated encryption modes, make sure to decrypt using the old Chilkat version and re-encrypt using mode 4 (WinZip compatible AES encryption) prior to updating to the new Chilkat version.

Important:The Encryption and PasswordProtect properties are mutually exclusive. PasswordProtect corresponds to the older Zip 2.0 encryption, commonly referred to as a "password-protected" zip. If the PasswordProtect is set to TRUE, the Encryption property should be set to 0. If the Encryption property is set to a non-zero value, then PasswordProtect should be set to FALSE. A zip cannot be both password-protected and strong-encrypted.

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EncryptKeyLength
int CkZipW_getEncryptKeyLength(HCkZipW cHandle);
void CkZipW_putEncryptKeyLength(HCkZipW cHandle, int newVal);

The encryption key length if AES, Blowfish, Twofish, or WinZip-compatible AES encryption is used. This value must be 128, 192, or 256. The default value is 128.

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EncryptPassword
void CkZipW_getEncryptPassword(HCkZipW cHandle, HCkString retval);
void CkZipW_putEncryptPassword(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_encryptPassword(HCkZipW cHandle);

The password used when writing a password-protected or strong-encrytped Zip.

Note:The SetPassword method has the effect of setting both this property as well as the DecryptPassword property. The SetPassword method should no longer be used. It has been replaced by the DecryptPassword and EncryptPassword properties to make it possible to open an encrypted zip and re-write it with a new password.

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ExeDefaultDir
void CkZipW_getExeDefaultDir(HCkZipW cHandle, HCkString retval);
void CkZipW_putExeDefaultDir(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_exeDefaultDir(HCkZipW cHandle);

(Relevant only when running on a Microsoft Windows operating system.) Specifies the default unzip directory path to appear in the user-interface dialog box when the Windows-based self-extracting EXE is run.

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ExeFinishNotifier
BOOL CkZipW_getExeFinishNotifier(HCkZipW cHandle);
void CkZipW_putExeFinishNotifier(HCkZipW cHandle, BOOL newVal);

(Relevant only when running on a Microsoft Windows operating system.) If set to TRUE, a "Finished" dialog box is displayed when the self-extracting EXE is finished extracting. The caption, title, and button text of the finish notifier dialog may be customized by calling SetExeConfigParam. The default value is FALSE.

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ExeIconFile
void CkZipW_getExeIconFile(HCkZipW cHandle, HCkString retval);
void CkZipW_putExeIconFile(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_exeIconFile(HCkZipW cHandle);

(Relevant only when running on a Microsoft Windows operating system.) Applies to creating self-extracting EXEs. This property can be set to a pre-existing icon filename (.ico) that will be embedded within the to-be-created EXE and set as its default icon.

Note: This property is only possible for 32-bit applications. (Meaning that the application that is creating the self-extracting EXE must be a 32-bit application if an ExeIconFile is to be used.)

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ExeNoInterface
BOOL CkZipW_getExeNoInterface(HCkZipW cHandle);
void CkZipW_putExeNoInterface(HCkZipW cHandle, BOOL newVal);

(Relevant only when running on a Microsoft Windows operating system.) Applies to creating Windows-based self-extracting EXEs. When set to TRUE, the to-be-created EXE will run without a user-interface. The default value is FALSE.

Note: The ExeSilentProgress property needs to be set to TRUE for the extract to be truly silent.

Important: If the AutoTemp property = TRUE and there is no AutoRun EXE, and there is no ExeUnzipDir set, then the self-extracting EXE will always display a dialog to get the unzip directory. The reason is that it makes no sense to silently unzip to an auto-selected (and unknown) temp directory without anything happening afterwards.

Important: If the self-extracting EXE is encrypted, a password dialog will be displayed. The password dialog may be suppressed if the password is provided on the command line via the -pwd command-line option.

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ExeSilentProgress
BOOL CkZipW_getExeSilentProgress(HCkZipW cHandle);
void CkZipW_putExeSilentProgress(HCkZipW cHandle, BOOL newVal);

(Relevant only when running on a Microsoft Windows operating system.) Determines whether a progress dialog is displayed when the self-extracting EXE is run. If ExeNoInterface = FALSE (i.e. there is a main dialog with the ability to select the unzip directory), then the progress dialog is (by default) shown as a progress bar within the main dialog -- and this property has no effect. If ExeNoInterface = TRUE, then a progress-only dialog is displayed if ExeSilentProgress = FALSE. The default value of ExeSilentProgress is TRUE.

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ExeTitle
void CkZipW_getExeTitle(HCkZipW cHandle, HCkString retval);
void CkZipW_putExeTitle(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_exeTitle(HCkZipW cHandle);

(Relevant only when running on a Microsoft Windows operating system.) Applies to creating Windows-based self-extracting EXEs. Sets the title of the main user-interface dialog that appears when the self-extracting EXE runs.

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ExeUnzipCaption
void CkZipW_getExeUnzipCaption(HCkZipW cHandle, HCkString retval);
void CkZipW_putExeUnzipCaption(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_exeUnzipCaption(HCkZipW cHandle);

(Relevant only when running on a Microsoft Windows operating system.) Applies to creating MS Windows-based self-extracting EXEs. Sets the unzipping caption of the main user-interface dialog that appears when the self-extracting EXE runs.

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ExeUnzipDir
void CkZipW_getExeUnzipDir(HCkZipW cHandle, HCkString retval);
void CkZipW_putExeUnzipDir(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_exeUnzipDir(HCkZipW cHandle);

(Relevant only when running on a Microsoft Windows operating system.) Applies to creating MS Windows self-extracting EXEs. Stores a pre-defined unzip directory within the self-extracting EXE so that it automatically unzips to this directory without user-intervention.

Environment variables may be included if surrounded by percent characters. For example: %TEMP%. Environment variables are expanded (i.e. resolved) when the self-extracting EXE runs.

Note: To create a self-extracting EXE with no user-interaction, set the following properties to these values:

ExeSilentProgress = FALSE
ExeNoInterface = TRUE
ExeFinishNotifier = FALSE

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ExeWaitForSetup
BOOL CkZipW_getExeWaitForSetup(HCkZipW cHandle);
void CkZipW_putExeWaitForSetup(HCkZipW cHandle, BOOL newVal);

(Relevant only when running on a Microsoft Windows operating system.) If TRUE, the self-extracting EXE will wait for the AutoRun EXE to complete before it exits. If FALSE, the self-extracting EXE dialog (or process if running silently with no user-interface), is allowed to exit prior to the completion of the AutoRun EXE. The default value is TRUE.

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ExeXmlConfig
void CkZipW_getExeXmlConfig(HCkZipW cHandle, HCkString retval);
void CkZipW_putExeXmlConfig(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_exeXmlConfig(HCkZipW cHandle);

(Relevant only when running on a Microsoft Windows operating system.) Allows for an XML config document to be used to specify all possible options for self-extracting EXEs. This property is a string containing the XML config document.

The XML should have this format:

<SfxConfig>
	<ErrPwdTitle>Title for incorrect password dialog</ErrPwdTitle>
	<ErrPwdCaption>Caption for incorrect password dialog</ErrPwdCaption>
	<FinOkBtn>Text on finish notifier button</FinOkBtn>
	<PwdOkBtn>Text on password challenge dialog's "OK" button.</PwdOkBtn>
	<PwdCancelBtn>Text on password challenge dialog's Cancel button.</PwdCancelBtn>
	<ErrInvalidPassword>Incorrect password error message.</ErrInvalidPassword>
	<MainUnzipBtn>Text on main dialog's unzip button</MainUnzipBtn>
	<MainCloseBtn>Text on main dialog's quit/exit button</MainCloseBtn>
	<MainBrowseBtn>Text on main dialog's browse-for-directory button.</MainBrowseBtn>
	<MainUnzipLabel>Caption displayed in main dialog.</MainUnzipLabel>
	<AutoTemp>"1|0 (Maps to the AutoTemp property)"</AutoTemp>
	<Cleanup>"1|0 (Deletes extracted files after the SetupExe is run.)"</Cleanup>
	<Debug>"1|0  (If 1, the EXE will not extract any files.)"</Debug>
	<Verbose>"1|0 (If 1, then verbose information is sent to the log.)"</Verbose>
	<ShowFin>"1|0" Maps to ExeFinishNotifier property.</ShowFin>
	<ShowMain>"1|0" Maps to ExeNoInterface property.</ShowMain>
	<ShowProgress>"1|0" Maps to ExeSilentProgress property.</ShowProgress>
	<WaitForSetup>"1|0" Maps to ExeWaitForSetup property.</WaitForSetup>
	<Encryption>"1|0"  1=Yes, 0=No</Encryption>
	<KeyLength>128|192|256</KeyLength>
	<SetupExe>EXE to run after extracting. (Maps to AutoRun property)</SetupExe>
	<UnzipDir>Pre-defined unzip directory. (Maps to ExeUnzipDir property)>
	<DefaultDir>Default unzip directory to appear in the main dialog. 
                                                (Maps to ExeDefaultDir property)</DefaultDir>
	<IconFile>Icon file to be used (Maps to ExeIconFile property)</IconFile>
	<Url>Maps to ExeSourceUrl property.</Url>
	<MainTitle>Maps to ExeTitle property.</MainTitle>
	<MainCaption>Maps to ExeUnzipCaption property.</MainCaption>
	<FinTitle>Title for the finish notifier dialog.</FinTitle>
	<FinCaption>Caption for the finish notifier dialog.</FinTitle>
	<ProgressTitle>Title for the progress dialog.</ProgressTitle>
	<ProgressCaption>Caption for the progress dialog.</ProgressCaption>
	<PwTitle>Title for the password challenge dialog.</PwTitle>
	<PwCaption>Caption for the password challenge dialog.</PwCaption>
</SfxConfig>

A self-extracting EXE can be run from the command line with the "-log {logFilePath}" option to create a log with information for debugging.

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FileCount
int CkZipW_getFileCount(HCkZipW cHandle);

The number of files (excluding directories) contained within the Zip.

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FileName
void CkZipW_getFileName(HCkZipW cHandle, HCkString retval);
void CkZipW_putFileName(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_fileName(HCkZipW cHandle);

The path (absolute or relative) of the Zip archive. This is the path of the file that is created or overwritten when the zip is saved.

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HasZipFormatErrors
BOOL CkZipW_getHasZipFormatErrors(HCkZipW cHandle);

TRUE if the opened zip contained file format errors (that were not severe enough to prevent the zip from being opened and parsed).

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HeartbeatMs
int CkZipW_getHeartbeatMs(HCkZipW cHandle);
void CkZipW_putHeartbeatMs(HCkZipW cHandle, int newVal);

The number of milliseconds between each AbortCheck event callback. The AbortCheck callback allows an application to abort any method call prior to completion. If HeartbeatMs is 0 (the default), no AbortCheck event callbacks will fire.

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IgnoreAccessDenied
BOOL CkZipW_getIgnoreAccessDenied(HCkZipW cHandle);
void CkZipW_putIgnoreAccessDenied(HCkZipW cHandle, BOOL newVal);

If TRUE, then files that cannot be read due to "access denied" (i.e. a file permission error) will be ignored and the call to WriteZip, WriteZipAndClose, WriteExe, etc. will return a success status. If FALSE, then the "access denied" filesystem errors are not ignored and any occurrence will cause the zip writing to fail. The default value is TRUE.

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LastErrorHtml
void CkZipW_getLastErrorHtml(HCkZipW cHandle, HCkString retval);
const wchar_t *CkZipW_lastErrorHtml(HCkZipW cHandle);

Provides information in HTML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastErrorText
void CkZipW_getLastErrorText(HCkZipW cHandle, HCkString retval);
const wchar_t *CkZipW_lastErrorText(HCkZipW cHandle);

Provides information in plain-text format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastErrorXml
void CkZipW_getLastErrorXml(HCkZipW cHandle, HCkString retval);
const wchar_t *CkZipW_lastErrorXml(HCkZipW cHandle);

Provides information in XML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastMethodSuccess
BOOL CkZipW_getLastMethodSuccess(HCkZipW cHandle);
void CkZipW_putLastMethodSuccess(HCkZipW cHandle, BOOL newVal);
Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of TRUE indicates success, a value of FALSE indicates failure. This property is automatically set for method calls. It is not modified by property accesses. The property is automatically set to indicate success for the following types of method calls:

  • Any method that returns a string.
  • Any method returning a Chilkat object, binary bytes, or a date/time.
  • Any method returning a standard boolean status value where success = TRUE and failure = FALSE.
  • Any method returning an integer where failure is defined by a return value less than zero.

Note: Methods that do not fit the above requirements will always set this property equal to TRUE. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

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NumEntries
int CkZipW_getNumEntries(HCkZipW cHandle);

The number of entries in the Zip, including both files and directories.

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OemCodePage
int CkZipW_getOemCodePage(HCkZipW cHandle);
void CkZipW_putOemCodePage(HCkZipW cHandle, int newVal);

Sets the OEM code page to be used for Unicode filenames. This property defaults to the OEM code page of the computer.

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OverwriteExisting
BOOL CkZipW_getOverwriteExisting(HCkZipW cHandle);
void CkZipW_putOverwriteExisting(HCkZipW cHandle, BOOL newVal);

Determines whether existing files are overwritten during unzipping. The default is TRUE, which means that already-existing files will be overwritten. Set this property = FALSE to prevent existing files from being overwritten when unzipping.

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PasswordProtect
BOOL CkZipW_getPasswordProtect(HCkZipW cHandle);
void CkZipW_putPasswordProtect(HCkZipW cHandle, BOOL newVal);

TRUE if the Zip should be password-protected using older Zip 2.0 encryption, commonly referred to as "password-protection".

This property is set when a zip archive is opened by any of the Open* methods, such as OpenZip, OpenFromMemory, etc.

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PathPrefix
void CkZipW_getPathPrefix(HCkZipW cHandle, HCkString retval);
void CkZipW_putPathPrefix(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_pathPrefix(HCkZipW cHandle);

A prefix that is added to each filename when zipping. One might set the PathPrefix to "subdir/" so that files are unzipped to a specified subdirectory when unzipping.

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PercentDoneScale
int CkZipW_getPercentDoneScale(HCkZipW cHandle);
void CkZipW_putPercentDoneScale(HCkZipW cHandle, int newVal);
Introduced in version 9.5.0.49

This property is only valid in programming environment and languages that allow for event callbacks.

Sets the value to be defined as 100% complete for the purpose of PercentDone event callbacks. The defaut value of 100 means that at most 100 event PercentDone callbacks will occur in a method that (1) is event enabled and (2) is such that it is possible to measure progress as a percentage completed. This property may be set to larger numbers to get more fine-grained PercentDone callbacks. For example, setting this property equal to 1000 will provide callbacks with .1 percent granularity. For example, a value of 453 would indicate 45.3% competed. This property is clamped to a minimum value of 10, and a maximum value of 100000.

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PwdProtCharset
void CkZipW_getPwdProtCharset(HCkZipW cHandle, HCkString retval);
void CkZipW_putPwdProtCharset(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_pwdProtCharset(HCkZipW cHandle);
Introduced in version 9.5.0.73

For older password-protected Zip archives (Zip 2.0 encryption), specifies the charset used for the binary representation of the decrypt password. The default value is "ansi". Other possible choices are cp850, cp437, or any of the code pages listed at the link below.

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TempDir
void CkZipW_getTempDir(HCkZipW cHandle, HCkString retval);
void CkZipW_putTempDir(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_tempDir(HCkZipW cHandle);

The temporary directory to use when unzipping files. When running in ASP or ASP.NET, the default value of TempDir is set to the directory where the .zip is being written. Set this property to override the default.

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TextFlag
BOOL CkZipW_getTextFlag(HCkZipW cHandle);
void CkZipW_putTextFlag(HCkZipW cHandle, BOOL newVal);

If set to TRUE, the component will set the "text flag" for each file having these filename extensions: .txt, .xml, .htm, and .html. It will also preserve the "text flag" for existing zips that are opened and rewritten. By default, this property is set to FALSE.

It is generally not necessary to set the text flag for a zip entry.

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VerboseLogging
BOOL CkZipW_getVerboseLogging(HCkZipW cHandle);
void CkZipW_putVerboseLogging(HCkZipW cHandle, BOOL newVal);

If set to TRUE, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is FALSE. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

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Version
void CkZipW_getVersion(HCkZipW cHandle, HCkString retval);
const wchar_t *CkZipW_version(HCkZipW cHandle);

Version of the component/library, such as "9.5.0.63"

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Zipx
BOOL CkZipW_getZipx(HCkZipW cHandle);
void CkZipW_putZipx(HCkZipW cHandle, BOOL newVal);

Starting in v9.4.1, Chilkat Zip will automatically unzip ZIPX files using any of the following compression methods: BZIP2, PPMd, LZMA, and Deflate64 ("Deflate64" is a trademark of PKWare, Inc.)

This property, however, controls whether or not a ZipX is automatically produced where the best compression algorithm for each file is automatically chosen based on file type. This property is for writing zip archives. It does not apply to when unzipping ZIPX archives, Chilkat Zip automatically handles the various compression algorithms when unzipping.

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ZipxDefaultAlg
void CkZipW_getZipxDefaultAlg(HCkZipW cHandle, HCkString retval);
void CkZipW_putZipxDefaultAlg(HCkZipW cHandle, const wchar_t *newVal);
const wchar_t *CkZipW_zipxDefaultAlg(HCkZipW cHandle);

The default compression algorithm to be used when creating ZIPX archives. The default value is "deflate". Other possible values are "ppmd", "lzma", "bzip2" and "deflate64". When writing a ZIPX archive, if the file extension does not indicate an obvious choice for the appropriate compression algorithm, then the ZipxDefaultAlg is used.

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Methods

AddEmbedded
BOOL CkZipW_AddEmbedded(HCkZipW cHandle, const wchar_t *exeFilename, const wchar_t *resourceName, const wchar_t *zipFilename);

(Relevant only when running on a Microsoft Windows operating system.) Embeds a Zip file into an EXE as a custom resource. This resource can be opened by the EXE containing it at runtime by using the OpenMyEmbedded method.

Important: In Visual Studio 2010, the linker has a property "Randomized Base Address" (Project Properties/Linker) that defaults to "YES", but the default is "NO" in Visual Studio 2008. (The property is nonexistent in Visual Studio 2005 and earlier.) This enables ASLR ( Address Space Layout Randomization) in Vista and up, and prevents the proper code injection in the executable address space. To successfully embed a .zip as a resource within an EXE, this Visual Studio property must be set to "NO".

Returns TRUE for success, FALSE for failure.

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AddNoCompressExtension
void CkZipW_AddNoCompressExtension(HCkZipW cHandle, const wchar_t *fileExtension);

Attempting to compress already-compressed data is usually a waste of CPU cycles with little or no benefit. In fact, it is possible that attempting to compress already-compressed data results in a slightly increased size. The Zip file format allows for files to be "stored" rather than compressed. This allows the file data to be streamed directly into a .zip without compression.

An instance of the Zip object has an internal list of "no compress" extensions. A filename with a "no compress" extension is "stored" rather than compressed. Additional "no compress" extensions may be added by calling this method (once per file extension). You should pass the file extension, such as ".xyz" in fileExtension.

"no compress" extensions may be removed by calling RemoveNoCompressExtension.

The default "no compress" extensions are: .zip, .gif, .jpg, .gz, .rar, .jar, .tgz, .bz2, .z, .rpm, .msi, .png

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AppendBase64
HCkZipEntryW CkZipW_AppendBase64(HCkZipW cHandle, const wchar_t *fileName, const wchar_t *encodedCompressedData);

Creates a new Zip entry and initializes it with already-compressed data that is Base64 encoded. (The ZipEntry.CopyBase64 method can be used to retrieve the compressed data in Base64 format.)

Note 1: This method only updates the zip object. To update (rewrite) a zip file, either the WriteZip or WriteZipAndClose method would need to be called.

Note 2: It is assumed that the compressed data is unencrypted deflated data. (Meaning data compressed using the "deflate" compression algorithm.)

Returns NULL on failure

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AppendBd
HCkZipEntryW CkZipW_AppendBd(HCkZipW cHandle, const wchar_t *pathInZip, HCkBinDataW byteData);
Introduced in version 9.5.0.70

Appends the contents of byteData as a new entry to this zip object. The zip entry object containing the data is returned.

Returns NULL on failure

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AppendCompressed
HCkZipEntryW CkZipW_AppendCompressed(HCkZipW cHandle, const wchar_t *filename, const unsigned char * inData);

Append memory data that is already Zip-compressed to the Zip object. The ZipEntry object containing the compressed data is returned. Note: This method appends the compressed data for a single zip entry. To load an entire in-memory .zip, call OpenFromMemory instead.

Note 1: This method only updates the zip object. To update (rewrite) a zip file, either the WriteZip or WriteZipAndClose method would need to be called.

Note 2: It is assumed that the compressed data is unencrypted deflated data. (Meaning data compressed using the "deflate" compression algorithm.)

Returns NULL on failure

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AppendData
HCkZipEntryW CkZipW_AppendData(HCkZipW cHandle, const wchar_t *fileName, const unsigned char * inData);

Appends in-memory data as a new entry to a Zip object. The ZipEntry object containing the data is returned.

Note: This method only updates the zip object. To update (rewrite) a zip file, either the WriteZip or WriteZipAndClose method would need to be called.

Returns NULL on failure

More Information and Examples
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AppendDataEncoded
HCkZipEntryW CkZipW_AppendDataEncoded(HCkZipW cHandle, const wchar_t *filename, const wchar_t *encoding, const wchar_t *data);
Introduced in version 9.5.0.59

Appends in-memory data as a new entry to a Zip object. The filename is the filename of the entry as it will appear within the zip. The encoding is the encoding of the data, such as "base64", "hex", etc. The full list of encodings is listed at the web page linked below.

Returns the zip entry object.

Note: This method only updates the zip object. To update (rewrite) a zip file, either the WriteZip or WriteZipAndClose method would need to be called.

Returns NULL on failure

More Information and Examples
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AppendFiles
BOOL CkZipW_AppendFiles(HCkZipW cHandle, const wchar_t *filePattern, BOOL recurse);

Appends one or more files to the Zip object. The filePattern can use the "*" wildcard character for 0 or more of any characterSet recurse equal to True to recursively add all subdirectories, or False to only add files in the current directory.

Note: This method only updates the zip object. To update (rewrite) a zip file, either the WriteZip or WriteZipAndClose method would need to be called.

Returns TRUE for success, FALSE for failure.

More Information and Examples
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AppendFilesAsync (1)
HCkTaskW CkZipW_AppendFilesAsync(HCkZipW cHandle, const wchar_t *filePattern, BOOL recurse);

Creates an asynchronous task to call the AppendFiles method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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AppendFilesEx
BOOL CkZipW_AppendFilesEx(HCkZipW cHandle, const wchar_t *filePattern, BOOL recurse, BOOL saveExtraPath, BOOL archiveOnly, BOOL includeHidden, BOOL includeSystem);

Appends one or more files to the Zip object. The filePattern can use the "*" and "?" wildcard characters where "*" means 0 or more of any character and "?" means any single character. The recurse controls whether directories are recursively traversed. Set recurse equal to TRUE to append files and subdirectories in the directory tree. Set recurse equal to FALSE to add files only from the indicated directory.

The saveExtraPath only applies when the filePattern is an absolute path pattern, such as "C:/temp/abc/*.txt". If saveExtraPath is TRUE, then the absolute path will be included in the zip entry filenames as relative paths. For example, "temp/abc/xyz.txt".

The archiveOnly, includeHidden, and includeSystem flags only apply when on the Windows operating system. If archiveOnly is TRUE, then only files that have the archive bit set will be included in the zip. If includeHidden is FALSE, then hidden files are not included. If includeSystem is FALSE, then files having the System attribute are not included.

Note: This method does not write the zip archive. It simply adds references to the files that will be included in the .zip when the WriteZip or WriteZipAndClose methods are eventually called. Files and/or data may be added to the zip object by calling any combination of the Append* methods before finally writing the zip via one of the Write* methods.

Returns TRUE for success, FALSE for failure.

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AppendFilesExAsync (1)
HCkTaskW CkZipW_AppendFilesExAsync(HCkZipW cHandle, const wchar_t *filePattern, BOOL recurse, BOOL saveExtraPath, BOOL archiveOnly, BOOL includeHidden, BOOL includeSystem);

Creates an asynchronous task to call the AppendFilesEx method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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AppendHex
HCkZipEntryW CkZipW_AppendHex(HCkZipW cHandle, const wchar_t *fileName, const wchar_t *encodedCompressedData);

Creates a new Zip entry and initializes it with already-compressed data that is hexidecimal encoded. (The ZipEntry.CopyHex method can be used to retrieve the compressed data in Hex format.)

Note 1: This method only updates the zip object. To update (rewrite) a zip file, either the WriteZip or WriteZipAndClose method would need to be called.

Note 2: It is assumed that the compressed data is unencrypted deflated data. (Meaning data compressed using the "deflate" compression algorithm.)

Returns NULL on failure

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AppendMultiple
BOOL CkZipW_AppendMultiple(HCkZipW cHandle, HCkStringArrayW fileSpecs, BOOL recurse);

This method is the same as calling AppendFiles multiple times - once for each file pattern in fileSpecs

Note: This method only updates the zip object. To update (rewrite) a zip file, either the WriteZip or WriteZipAndClose method would need to be called.

Returns TRUE for success, FALSE for failure.

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AppendMultipleAsync (1)
HCkTaskW CkZipW_AppendMultipleAsync(HCkZipW cHandle, HCkStringArrayW fileSpecs, BOOL recurse);

Creates an asynchronous task to call the AppendMultiple method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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AppendNew
HCkZipEntryW CkZipW_AppendNew(HCkZipW cHandle, const wchar_t *fileName);

Appends a new and empty entry to the Zip object and returns the ZipEntry object. Data can be appended to the entry by calling ZipEntry.AppendData.

Important: To append an already-existing file, call the AppendOneFileOrDir method. The AppendNew method inserts a new and empty file entry within the Zip object. The purpose of AppendNew is to either create an empty file within the Zip, or to create a new file entry which can then be filled with data by calling the entry's AppendData method.

Note: This method only updates the zip object. To update (rewrite) a zip file, either the WriteZip or WriteZipAndClose method would need to be called.

Returns NULL on failure

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AppendNewDir
HCkZipEntryW CkZipW_AppendNewDir(HCkZipW cHandle, const wchar_t *dirName);

Adds an entry to the zip so that when it unzips, a new directory (with no files) is created. The directory does not need to exist on the local filesystem when calling this method. The dirName is simply a string that is used as the directory path for the entry added to the zip. The zip entry object is returned.

Note: This method only updates the zip object. To update (rewrite) a zip file, either the WriteZip or WriteZipAndClose method would need to be called.

Returns NULL on failure

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AppendOneFileOrDir
BOOL CkZipW_AppendOneFileOrDir(HCkZipW cHandle, const wchar_t *fileOrDirPath, BOOL saveExtraPath);

Appends a single file or directory to the Zip object. The saveExtraPath applies when fileOrDirPath is an absolute (non-relative) path. If saveExtraPath is TRUE, then the absolute path is made relative and saved in the zip. For example, if the fileOrDirPath is "C:/temp/xyz/test.txt" and saveExtraPath is TRUE, then the path in the zip will be "./temp/xyz/test.txt". If however, fileOrDirPath contains a relative path, then saveExtraPath has no effect.

Returns TRUE for success, FALSE for failure.

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AppendOneFileOrDirAsync (1)
HCkTaskW CkZipW_AppendOneFileOrDirAsync(HCkZipW cHandle, const wchar_t *fileOrDirPath, BOOL saveExtraPath);

Creates an asynchronous task to call the AppendOneFileOrDir method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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AppendString
HCkZipEntryW CkZipW_AppendString(HCkZipW cHandle, const wchar_t *internalZipFilepath, const wchar_t *textData);

Adds an in-memory string to the Zip object. The textData argument is converted to the ANSI charset before being added to the Zip. If the Zip were written to disk by calling WriteZip, and later unzipped, the entry would unzip to an ANSI text file.

Note: This method only updates the zip object. To update (rewrite) a zip file, either the WriteZip or WriteZipAndClose method would need to be called.

Returns NULL on failure

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AppendString2
HCkZipEntryW CkZipW_AppendString2(HCkZipW cHandle, const wchar_t *internalZipFilepath, const wchar_t *textData, const wchar_t *charset);

Same as AppendString, but allows the charset to be specified. The textData is converted to charset before being added to the zip. The internalZipFilepath is the path of the file that will be stored within the zip.

Note: This method only updates the zip object. To update (rewrite) a zip file, either the WriteZip or WriteZipAndClose method would need to be called.

Returns NULL on failure

More Information and Examples
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AppendZip
BOOL CkZipW_AppendZip(HCkZipW cHandle, const wchar_t *zipFileName);

Adds the contents of another existing Zip file to this Zip object.

Returns TRUE for success, FALSE for failure.

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CloseZip
void CkZipW_CloseZip(HCkZipW cHandle);

Closes an open Zip file. This is identical to calling NewZip. (NewZip closes the current Zip file, if open, and initializes the Zip object to be empty. Zip files are only created when WriteZip is called.)

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DeleteEntry
BOOL CkZipW_DeleteEntry(HCkZipW cHandle, HCkZipEntryW entry);

Removes a Zip entry from the calling Zip object.

Returns TRUE for success, FALSE for failure.

More Information and Examples
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ExcludeDir
void CkZipW_ExcludeDir(HCkZipW cHandle, const wchar_t *dirName);

Adds a directory name to be excluded when AppendFiles is called to add an entire directory tree. All directories having a name equal to an excluded directory will not be included when AppendFiles (or AppendFileEx) is called. Multiple directories can be excluded by calling ExcludeDir multiple times. The name comparison is case-insensitive.

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Extract
BOOL CkZipW_Extract(HCkZipW cHandle, const wchar_t *dirPath);

Unzip all the files into the specified directory. Subdirectories are automatically created as needed.

Returns TRUE for success, FALSE for failure.

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ExtractAsync (1)
HCkTaskW CkZipW_ExtractAsync(HCkZipW cHandle, const wchar_t *dirPath);

Creates an asynchronous task to call the Extract method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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ExtractExe
BOOL CkZipW_ExtractExe(HCkZipW cHandle, const wchar_t *exePath, const wchar_t *dirPath);
Introduced in version 9.5.0.44

Extracts files from a Chilkat produced self-extracting EXE into the specified directory. Subdirectories are automatically created as needed. If the self-extracting EXE is encrypted, be sure to set the DecryptPassword property prior to calling this method.

Returns TRUE for success, FALSE for failure.

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ExtractExeAsync (1)
HCkTaskW CkZipW_ExtractExeAsync(HCkZipW cHandle, const wchar_t *exePath, const wchar_t *dirPath);
Introduced in version 9.5.0.44

Creates an asynchronous task to call the ExtractExe method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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ExtractInto
BOOL CkZipW_ExtractInto(HCkZipW cHandle, const wchar_t *dirPath);

Unzips all the files in a Zip into a single directory regardless of the path stored in the Zip

Returns TRUE for success, FALSE for failure.

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ExtractMatching
BOOL CkZipW_ExtractMatching(HCkZipW cHandle, const wchar_t *dirPath, const wchar_t *pattern);

Unzip all files matching a wildcard pattern.

Returns TRUE for success, FALSE for failure.

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ExtractNewer
BOOL CkZipW_ExtractNewer(HCkZipW cHandle, const wchar_t *dirPath);

Extracts only the files that have more recent last-modified-times than the files on disk. This allows you to easily refresh only the files that have been updated.

Returns TRUE for success, FALSE for failure.

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ExtractOne
BOOL CkZipW_ExtractOne(HCkZipW cHandle, HCkZipEntryW entry, const wchar_t *dirPath);
This method is deprecated. It will be removed in a future version.

Identical to calling ZipEntry.Extract. This method is deprecated and the Extract method of the zip entry should be called instead.

Returns TRUE for success, FALSE for failure.

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FirstEntry
HCkZipEntryW CkZipW_FirstEntry(HCkZipW cHandle);

Return the first entry in the Zip. Call ZipEntry.NextEntry to iterate over the entries in a Zip until a NULL is returned.

Returns NULL on failure

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FirstMatchingEntry
HCkZipEntryW CkZipW_FirstMatchingEntry(HCkZipW cHandle, const wchar_t *pattern);

Returns the first entry having a filename matching a pattern. The "*" characters matches 0 or more of any character. The full filename, including path, is used when matching against the pattern. A NULL is returned if nothing matches.

Returns NULL on failure

More Information and Examples
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GetDirectoryAsXML
BOOL CkZipW_GetDirectoryAsXML(HCkZipW cHandle, const wchar_t *outXml);
const wchar_t *CkZipW_getDirectoryAsXML(HCkZipW cHandle);

Return the contents of the Zip file directory in an XML formatted string

Returns TRUE for success, FALSE for failure.

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GetEntryByID
HCkZipEntryW CkZipW_GetEntryByID(HCkZipW cHandle, int entryID);

Retrieves a ZipEntry by ID. Chilkat Zip.NET automatically assigns a unique ID to each ZipEntry in the Zip. This feature makes it easy to associate an item in a UI control with a ZipEntry.

Returns NULL on failure

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GetEntryByIndex
HCkZipEntryW CkZipW_GetEntryByIndex(HCkZipW cHandle, int index);

Retrieves a ZipEntry by index. The first entry is at index 0. This will return directory entries as well as files.

Returns NULL on failure

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GetEntryByName
HCkZipEntryW CkZipW_GetEntryByName(HCkZipW cHandle, const wchar_t *entryName);

Returns a ZipEntry by filename. If a full or partial path is part of the filename, this must be included in the filename parameter.

Returns NULL on failure

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GetExclusions
HCkStringArrayW CkZipW_GetExclusions(HCkZipW cHandle);

Returns the current collection of exclusion patterns that have been set by SetExclusions.

Returns NULL on failure

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GetExeConfigParam
BOOL CkZipW_GetExeConfigParam(HCkZipW cHandle, const wchar_t *name, const wchar_t *outStr);
const wchar_t *CkZipW_getExeConfigParam(HCkZipW cHandle, const wchar_t *name);

(Relevant only when running on a Microsoft Windows operating system.) Gets the value of an EXE config param as described in the ExeXmlConfig property.

Returns TRUE for success, FALSE for failure.

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InsertNew
HCkZipEntryW CkZipW_InsertNew(HCkZipW cHandle, const wchar_t *fileName, int beforeIndex);

Inserts a new and empty entry into the Zip object. To insert at the beginning of the Zip, beforeIndex should be 0. The ZipEntry's FileName property is initialized to fileName parameter.

Returns NULL on failure

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IsNoCompressExtension
BOOL CkZipW_IsNoCompressExtension(HCkZipW cHandle, const wchar_t *fileExtension);

Returns TRUE if the fileExtension is contained in the set of "no compress" extensions, otherwise returns FALSE. (See the documentation for the AddNoCompressExtension method.) The fileExtension may be passed with or without the ".". For example, both ".jpg" and "jpg" are acceptable.

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IsPasswordProtected
BOOL CkZipW_IsPasswordProtected(HCkZipW cHandle, const wchar_t *zipFilename);

Return True if a Zip file is password protected

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IsUnlocked
BOOL CkZipW_IsUnlocked(HCkZipW cHandle);

Returns True if the class is already unlocked, otherwise returns False.

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NewZip
BOOL CkZipW_NewZip(HCkZipW cHandle, const wchar_t *zipFilePath);

Clears and initializes the contents of the Zip object. If a Zip file was open, it is closed and all entries are removed from the object. The FileName property is set to the zipFilePath argument.

More Information and Examples
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OpenBd
BOOL CkZipW_OpenBd(HCkZipW cHandle, HCkBinDataW binData);
Introduced in version 9.5.0.66

Open a Zip contained in binData.

When a zip is opened, the PasswordProtect and Encryption properties will be appropriately set. If the zip is password protected (i.e. uses older Zip 2.0 encrypion), then the PasswordProtect property will be set to TRUE. If the zip is strong encrypted, the Encryption property will be set to a value 1 through 4, where 4 indicates WinZip compatible AES encryption.

Returns TRUE for success, FALSE for failure.

More Information and Examples
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OpenEmbedded
BOOL CkZipW_OpenEmbedded(HCkZipW cHandle, const wchar_t *exeFilename, const wchar_t *resourceName);

(Relevant only when running on a Microsoft Windows operating system.) Opens a Zip embedded in an MS Windows EXE

Returns TRUE for success, FALSE for failure.

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OpenFromByteData
BOOL CkZipW_OpenFromByteData(HCkZipW cHandle, const unsigned char * byteData);

Same as OpenFromMemory.

When a zip is opened, the PasswordProtect and Encryption properties will be appropriately set. If the zip is password protected (i.e. uses older Zip 2.0 encrypion), then the PasswordProtect property will be set to TRUE. If the zip is strong encrypted, the Encryption property will be set to a value 1 through 4, where 4 indicates WinZip compatible AES encryption.

Returns TRUE for success, FALSE for failure.

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OpenFromMemory
BOOL CkZipW_OpenFromMemory(HCkZipW cHandle, const unsigned char * inData);

Open a Zip that is completely in-memory. This allows for Zip files to be opened from non-filesystem sources, such as a database.

When a zip is opened, the PasswordProtect and Encryption properties will be appropriately set. If the zip is password protected (i.e. uses older Zip 2.0 encrypion), then the PasswordProtect property will be set to TRUE. If the zip is strong encrypted, the Encryption property will be set to a value 1 through 4, where 4 indicates WinZip compatible AES encryption.

Returns TRUE for success, FALSE for failure.

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OpenMyEmbedded
BOOL CkZipW_OpenMyEmbedded(HCkZipW cHandle, const wchar_t *resourceName);

(Relevant only when running on a Microsoft Windows operating system.) Opens a Zip embedded within the caller's MS Windows EXE.

Returns TRUE for success, FALSE for failure.

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OpenZip
BOOL CkZipW_OpenZip(HCkZipW cHandle, const wchar_t *zipPath);

Opens a Zip archive. Encrypted and password-protected zips may be opened without providing the password, but their contents may not be unzipped unless the correct password is provided via the DecryptPassword proprety, or the SetPassword method.

When a zip is opened, the PasswordProtect and Encryption properties will be appropriately set. If the zip is password protected (i.e. uses older Zip 2.0 encrypion), then the PasswordProtect property will be set to TRUE. If the zip is strong encrypted, the Encryption property will be set to a value 1 through 4, where 4 indicates WinZip compatible AES encryption.

Returns TRUE for success, FALSE for failure.

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OpenZipAsync (1)
HCkTaskW CkZipW_OpenZipAsync(HCkZipW cHandle, const wchar_t *zipPath);

Creates an asynchronous task to call the OpenZip method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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QuickAppend
BOOL CkZipW_QuickAppend(HCkZipW cHandle, const wchar_t *ZipFileName);

Efficiently appends additional files to an existing zip archive. QuickAppend leaves all entries in the existing .zip untouched. It operates by appending new files and updating the internal "central directory" of the zip archive.

Returns TRUE for success, FALSE for failure.

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QuickAppendAsync (1)
HCkTaskW CkZipW_QuickAppendAsync(HCkZipW cHandle, const wchar_t *ZipFileName);

Creates an asynchronous task to call the QuickAppend method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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RemoveEmbedded
BOOL CkZipW_RemoveEmbedded(HCkZipW cHandle, const wchar_t *exeFilename, const wchar_t *resourceName);

(Relevant only when running on a Microsoft Windows operating system.) Removes an embedded Zip from an MS-Windows EXE

Returns TRUE for success, FALSE for failure.

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RemoveNoCompressExtension
void CkZipW_RemoveNoCompressExtension(HCkZipW cHandle, const wchar_t *fileExtension);

Removes a file extension from the zip object's internal list of "no compress" extensions. (For more information, see AddNoCompressExtension.)

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ReplaceEmbedded
BOOL CkZipW_ReplaceEmbedded(HCkZipW cHandle, const wchar_t *exeFilename, const wchar_t *resourceName, const wchar_t *zipFilename);

(Relevant only when running on a Microsoft Windows operating system.) Replace a Zip embedded in an MS-Windows EXE with another Zip file.

Returns TRUE for success, FALSE for failure.

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SaveLastError
BOOL CkZipW_SaveLastError(HCkZipW cHandle, const wchar_t *path);

Saves the last-error information (the contents of LastErrorXml) to an XML formatted file.

Returns TRUE for success, FALSE for failure.

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SetCompressionLevel
void CkZipW_SetCompressionLevel(HCkZipW cHandle, int level);

Sets the compression level for all file and data entries. The compression level for a mapped entry (i.e. an entry that is contained within an opened .zip, cannot be changed.) The default compression level is 6. A compression level of 0 is equivalent to no compression. The maximum compression level is 9.

The zip.SetCompressionLevel method must be called after appending the files (i.e. after the calls to AppendFile*, AppendData, or AppendOneFileOrDir).

A single call to SetCompressionLevel will set the compression level for all existing file and data entries.

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SetExclusions
void CkZipW_SetExclusions(HCkZipW cHandle, HCkStringArrayW excludePatterns);

Specify a collection of exclusion patterns to be used when adding files to a Zip. Each pattern in the collection can use the "*" wildcard character, where "*" indicates 0 or more occurrences of any character.

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SetExeConfigParam
void CkZipW_SetExeConfigParam(HCkZipW cHandle, const wchar_t *paramName, const wchar_t *paramValue);

Sets a self-extractor property that is embedded in the resultant EXE created by the WriteExe or WriteExe2 methods. The paramName is one of the XML tags listed in the ExeXmlConfig property.

For example, to specify the text for the self-extractor's main dialog unzip button, paramName would be "MainUnzipBtn".

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SetPassword
void CkZipW_SetPassword(HCkZipW cHandle, const wchar_t *password);

Set the password for an encrypted or password-protected Zip.

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UnlockComponent
BOOL CkZipW_UnlockComponent(HCkZipW cHandle, const wchar_t *regCode);

Unlocks the component allowing for the full functionality to be used. If a purchased unlock code is passed, there is no expiration. Any other string automatically begins a fully-functional 30-day trial the first time UnlockComponent is called.

Returns TRUE for success, FALSE for failure.

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Unzip
int CkZipW_Unzip(HCkZipW cHandle, const wchar_t *dirPath);

Unzips and returns the number of files unzipped, or -1 if a failure occurs. Subdirectories are automatically created during the unzipping process.

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UnzipAsync (1)
HCkTaskW CkZipW_UnzipAsync(HCkZipW cHandle, const wchar_t *dirPath);

Creates an asynchronous task to call the Unzip method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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UnzipInto
int CkZipW_UnzipInto(HCkZipW cHandle, const wchar_t *dirPath);

Unzips and returns the number of files unzipped, or -1 if a failure occurs. All files in the Zip are unzipped into the specfied dirPath regardless of the directory path information contained in the Zip. This has the effect of collapsing all files into a single directory. If several files in the Zip have the same name, the files unzipped last will overwrite the files already unzipped.

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UnzipIntoAsync (1)
HCkTaskW CkZipW_UnzipIntoAsync(HCkZipW cHandle, const wchar_t *dirPath);

Creates an asynchronous task to call the UnzipInto method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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UnzipMatching
int CkZipW_UnzipMatching(HCkZipW cHandle, const wchar_t *dirPath, const wchar_t *pattern, BOOL verbose);

Same as Unzip, but only unzips files matching a pattern. If no wildcard characters ('*') are used, then only files that exactly match the pattern will be unzipped. The "*" characters matches 0 or more of any character.

More Information and Examples
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UnzipMatchingAsync (1)
HCkTaskW CkZipW_UnzipMatchingAsync(HCkZipW cHandle, const wchar_t *dirPath, const wchar_t *pattern, BOOL verbose);

Creates an asynchronous task to call the UnzipMatching method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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UnzipMatchingInto
int CkZipW_UnzipMatchingInto(HCkZipW cHandle, const wchar_t *dirPath, const wchar_t *pattern, BOOL verbose);

Unzips matching files into a single directory, ignoring all path information stored in the Zip.

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UnzipMatchingIntoAsync (1)
HCkTaskW CkZipW_UnzipMatchingIntoAsync(HCkZipW cHandle, const wchar_t *dirPath, const wchar_t *pattern, BOOL verbose);

Creates an asynchronous task to call the UnzipMatchingInto method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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UnzipNewer
int CkZipW_UnzipNewer(HCkZipW cHandle, const wchar_t *dirPath);

Same as Unzip, but only files that don't already exist on disk, or have later file modification dates are unzipped.

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UnzipNewerAsync (1)
HCkTaskW CkZipW_UnzipNewerAsync(HCkZipW cHandle, const wchar_t *dirPath);

Creates an asynchronous task to call the UnzipNewer method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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VerifyPassword
BOOL CkZipW_VerifyPassword(HCkZipW cHandle);

Tests the current DecryptPassword setting against the currently opened zip. Returns TRUE if the password is valid, otherwise returns FALSE.

More Information and Examples
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WriteBd
BOOL CkZipW_WriteBd(HCkZipW cHandle, HCkBinDataW binData);
Introduced in version 9.5.0.66

Same as WriteZip, but instead of writing the Zip to a file, it writes to binData. Zips that are written to binData can be opened by calling OpenBd. Note: Both WriteBd and OpenBd are added in Chilkat v9.5.0.66

Returns TRUE for success, FALSE for failure.

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WriteBdAsync (1)
HCkTaskW CkZipW_WriteBdAsync(HCkZipW cHandle, HCkBinDataW binData);
Introduced in version 9.5.0.66

Creates an asynchronous task to call the WriteBd method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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WriteExe
BOOL CkZipW_WriteExe(HCkZipW cHandle, const wchar_t *exeFilename);

(Relevant only when running on a Microsoft Windows operating system.) Writes an MS-Windows self-extracting executable. There are no limitations on the total size, individual file size, or number of files that can be added to a self-extracting EXE.

If the resultant EXE will automatically accept these command-line arguments when run:

-log logFileName
Creates a log file that lists the settings embedded within the EXE and logs the errors, warnings, and other information about the self-extraction.
-unzipDir unzipDirectoryPath
Unzips to this directory path without user intervention.
-pwd password
Specifies the password for an encrypted EXE
-ap autoRunParams
Specifies the command line parameters to be passed to the AutoRun executable (embedded within the EXE).

Returns TRUE for success, FALSE for failure.

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WriteExeToMemory
BOOL CkZipW_WriteExeToMemory(HCkZipW cHandle, const unsigned char * outBytes);

(Relevant only when running on a Microsoft Windows operating system.) Same as WriteExe, but instead of writing a file, the MS-Windows EXE is written to memory.

Returns TRUE for success, FALSE for failure.

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WriteToMemory
BOOL CkZipW_WriteToMemory(HCkZipW cHandle, const unsigned char * outData);

Same as WriteZip, but instead of writing the Zip to a file, it writes to memory. Zips that are written to memory can also be opened from memory by calling OpenFromMemory.

Returns TRUE for success, FALSE for failure.

More Information and Examples
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WriteToMemoryAsync (1)
HCkTaskW CkZipW_WriteToMemoryAsync(HCkZipW cHandle);

Creates an asynchronous task to call the WriteToMemory method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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WriteZip
BOOL CkZipW_WriteZip(HCkZipW cHandle);

Saves the Zip to a file and implictly re-opens it so further operations can continue. Use WriteZipAndClose to write and close the Zip. There is no limitation on the size of files that may be contained within a .zip, the total number of files in a .zip, or the total size of a .zip. If necessary, WriteZip will use the ZIP64 file format extensions when 4GB or file count limitations of the old zip file format are exceeded.

Returns TRUE for success, FALSE for failure.

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WriteZipAsync (1)
HCkTaskW CkZipW_WriteZipAsync(HCkZipW cHandle);

Creates an asynchronous task to call the WriteZip method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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WriteZipAndClose
BOOL CkZipW_WriteZipAndClose(HCkZipW cHandle);

Saves the Zip to a file and closes it. On return, the Zip object will be in the state as if NewZip had been called. There is no limitation on the size of files that may be contained within a .zip, the total number of files in a .zip, or the total size of a .zip. If necessary, WriteZip will use the ZIP64 file format extensions when 4GB or file count limitations of the old zip file format are exceeded.

Returns TRUE for success, FALSE for failure.

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WriteZipAndCloseAsync (1)
HCkTaskW CkZipW_WriteZipAndCloseAsync(HCkZipW cHandle);

Creates an asynchronous task to call the WriteZipAndClose method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

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