Zip Lianja Reference Documentation

Zip

Current Version: 9.5.0.97

Zip compression component.

Object Creation

loObject = createobject("CkZip")

Properties

AbortCurrent
AbortCurrent As Boolean
Introduced in version 9.5.0.58

When set to .T., 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 .F. when the next method is called. When the abort occurs, this property is reset to .F.. 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
AppendFromDir As Character

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
AutoRun As Character

(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
AutoRunParams As Character

(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
AutoTemp As Boolean

(Relevant only when running on a Microsoft Windows operating system.) This option applies to creating Windows-based self-extracting EXEs. If .T., 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 = .F.
ExeNoInterface = .T.
ExeFinishNotifier = .F.

The default AutoTemp value is .F..

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CaseSensitive
CaseSensitive As Boolean

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

The default value is .F..

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ClearArchiveAttribute
ClearArchiveAttribute As Boolean

Set this to .T. to clear the FILE_ATTRIBUTE_ARCHIVE file attribute of each file (in the local filesystem) during a zipping operation.

The default value is .F..

Note: The archive attribute or bit, is a Windows file attribute that when is set, it indicates that the file has changed since the last backup operation. When this property is .T., Chilkat Zip will clear the archive attribute of each local file after it has been successfully added to the zip.

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ClearReadOnlyAttr
ClearReadOnlyAttr As Boolean

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

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Comment
Comment As Character

The global Zip file comment.

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DebugLogFilePath
DebugLogFilePath As Character

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
DecryptPassword As Character

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
DiscardPaths As Boolean

If .T., discards all file path information when zipping. The default value is .F..

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Encryption
Encryption As Numeric

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 .T., 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 .F.. A zip cannot be both password-protected and strong-encrypted.

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EncryptKeyLength
EncryptKeyLength As Numeric

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
EncryptPassword As Character

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
ExeDefaultDir As Character

(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
ExeFinishNotifier As Boolean

(Relevant only when running on a Microsoft Windows operating system.) If set to .T., 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 .F..

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ExeIconFile
ExeIconFile As Character

(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
ExeNoInterface As Boolean

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

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

Important: If the AutoTemp property = .T. 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
ExeSilentProgress As Boolean

(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 = .F. (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 = .T., then a progress-only dialog is displayed if ExeSilentProgress = .F.. The default value of ExeSilentProgress is .T..

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ExeTitle
ExeTitle As Character

(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
ExeUnzipCaption As Character

(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
ExeUnzipDir As Character

(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: UNC paths, such as \\servername\path, are not supported.

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

ExeSilentProgress  = .F.<br>
ExeNoInterface = .T.<br>
ExeFinishNotifier = .F.

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ExeWaitForSetup
ExeWaitForSetup As Boolean

(Relevant only when running on a Microsoft Windows operating system.) If .T., the self-extracting EXE will wait for the AutoRun EXE to complete before it exits. If .F., 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 .T..

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ExeXmlConfig
ExeXmlConfig As Character

(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, 
                                                UNC paths, such as \\servername\path, are not supported.)>
	<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
FileCount As Numeric (read-only)

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

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FileName
FileName As Character

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
HasZipFormatErrors As Boolean (read-only)

.T. 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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IgnoreAccessDenied
IgnoreAccessDenied As Boolean

If .T., 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 .F., then the "access denied" filesystem errors are not ignored and any occurrence will cause the zip writing to fail. The default value is .T..

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LastErrorHtml
LastErrorHtml As Character (read-only)

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
LastErrorText As Character (read-only)

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
LastErrorXml As Character (read-only)

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
LastMethodSuccess As Boolean

Indicate whether the last method call succeeded or failed. A value of .T. indicates success, a value of .F. 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 = .T. and failure = .F..
  • 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 .T.. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

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MaxUncompressSize
MaxUncompressSize As Numeric
Introduced in version 9.5.0.96

An application can set this property to prevent unzipping any files larger than a max size uncompressed. The default value of this property is 0, which means any size file can be unzipped.

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NumEntries
NumEntries As Numeric (read-only)

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

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OemCodePage
OemCodePage As Numeric

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
OverwriteExisting As Boolean

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

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PasswordProtect
PasswordProtect As Boolean

.T. 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
PathPrefix As Character

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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PwdProtCharset
PwdProtCharset As Character
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
TempDir As Character

The temporary directory to use when unzipping files or writing a .zip (see the note below). 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.

Note: When writing a .zip, a temp file is only used if overwriting an existing .zip. The reason is to prevent losing the existing .zip if something fails when writing the new .zip. If the new .zip is successfully written, then the existing .zip is replaced with the new .zip.

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TextFlag
TextFlag As Boolean

If set to .T., 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 .F..

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

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UncommonOptions
UncommonOptions As Character
Introduced in version 9.5.0.84

This is a catch-all property to be used for uncommon needs. This property defaults to the empty string, and should typically remain empty.

Currently, the only possible option is "ForceZip64".

  • "ForceZip64" - Force the zip to be written with the Zip64 file format, even if not necessary.

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VerboseLogging
VerboseLogging As Boolean

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

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Version
Version As Character (read-only)

Version of the component/library, such as "9.5.0.94"

More Information and Examples
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Zipx
Zipx As Boolean

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
ZipxDefaultAlg As Character

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
AddEmbedded(exeFilename As Character, resourceName As Character, zipFilename As Character) As Boolean

(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 .T. for success, .F. for failure.

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AddNoCompressExtension
AddNoCompressExtension(fileExtension As Character)

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
AppendBase64(fileName As Character, encodedCompressedData As Character) As CkZipEntry

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 .F. on failure

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AppendBd
AppendBd(pathInZip As Character, byteData As CkBinData) As CkZipEntry
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 .F. on failure

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AppendDataEncoded
AppendDataEncoded(filename As Character, encoding As Character, data As Character) As CkZipEntry
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 .F. on failure

More Information and Examples
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AppendFiles
AppendFiles(filePattern As Character, recurse As Boolean) As Boolean

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 .T. for success, .F. for failure.

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AppendFilesAsync (1)
AppendFilesAsync(filePattern As Character, recurse As Boolean) As CkTask

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 .F. on failure

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AppendFilesEx
AppendFilesEx(filePattern As Character, recurse As Boolean, saveExtraPath As Boolean, archiveOnly As Boolean, includeHidden As Boolean, includeSystem As Boolean) As Boolean

Appends one or more files to the Zip object. The filePattern can use the "*" to mean 0 or more of any character. The recurse controls whether directories are recursively traversed. Set recurse equal to .T. to append files and subdirectories in the directory tree. Set recurse equal to .F. 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 .T., 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 .T., then only files that have the archive bit set will be included in the zip. If includeHidden is .F., then hidden files are not included. If includeSystem is .F., 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 .T. for success, .F. for failure.

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AppendFilesExAsync (1)
AppendFilesExAsync(filePattern As Character, recurse As Boolean, saveExtraPath As Boolean, archiveOnly As Boolean, includeHidden As Boolean, includeSystem As Boolean) As CkTask

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 .F. on failure

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AppendHex
AppendHex(fileName As Character, encodedCompressedData As Character) As CkZipEntry

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 .F. on failure

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AppendMultiple
AppendMultiple(fileSpecs As CkStringArray, recurse As Boolean) As Boolean

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 .T. for success, .F. for failure.

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AppendMultipleAsync (1)
AppendMultipleAsync(fileSpecs As CkStringArray, recurse As Boolean) As CkTask

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 .F. on failure

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AppendNew
AppendNew(fileName As Character) As CkZipEntry

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 .F. on failure

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AppendNewDir
AppendNewDir(dirName As Character) As CkZipEntry

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 .F. on failure

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AppendOneFileOrDir
AppendOneFileOrDir(fileOrDirPath As Character, saveExtraPath As Boolean) As Boolean

Appends a single file or directory to the Zip object. The saveExtraPath applies when fileOrDirPath is an absolute (non-relative) path. If saveExtraPath is .T., 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 .T., 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 .T. for success, .F. for failure.

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AppendOneFileOrDirAsync (1)
AppendOneFileOrDirAsync(fileOrDirPath As Character, saveExtraPath As Boolean) As CkTask

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 .F. on failure

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AppendString
AppendString(internalZipFilepath As Character, textData As Character) As CkZipEntry

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 .F. on failure

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AppendString2
AppendString2(internalZipFilepath As Character, textData As Character, charset As Character) As CkZipEntry

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 .F. on failure

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AppendZip
AppendZip(zipFileName As Character) As Boolean

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

Returns .T. for success, .F. for failure.

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CloseZip
CloseZip()

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
DeleteEntry(entry As CkZipEntry) As Boolean

Removes a Zip entry from the calling Zip object.

Returns .T. for success, .F. for failure.

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ExcludeDir
ExcludeDir(dirName As Character)

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
Extract(dirPath As Character) As Boolean

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

Returns .T. for success, .F. for failure.

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ExtractAsync (1)
ExtractAsync(dirPath As Character) As CkTask

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 .F. on failure

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ExtractExe
ExtractExe(exePath As Character, dirPath As Character) As Boolean
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 .T. for success, .F. for failure.

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ExtractExeAsync (1)
ExtractExeAsync(exePath As Character, dirPath As Character) As CkTask
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 .F. on failure

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ExtractInto
ExtractInto(dirPath As Character) As Boolean

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

Returns .T. for success, .F. for failure.

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ExtractIntoAsync (1)
ExtractIntoAsync(dirPath As Character) As CkTask

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

Returns .F. on failure

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ExtractMatching
ExtractMatching(dirPath As Character, pattern As Character) As Boolean

Unzip all files matching a wildcard pattern.

Returns .T. for success, .F. for failure.

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ExtractMatchingAsync (1)
ExtractMatchingAsync(dirPath As Character, pattern As Character) As CkTask

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

Returns .F. on failure

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ExtractNewer
ExtractNewer(dirPath As Character) As Boolean

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 .T. for success, .F. for failure.

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ExtractNewerAsync (1)
ExtractNewerAsync(dirPath As Character) As CkTask

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

Returns .F. on failure

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FirstEntry
FirstEntry() As CkZipEntry

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

Returns .F. on failure

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FirstMatchingEntry
FirstMatchingEntry(pattern As Character) As CkZipEntry

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 .F. on failure

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GetDirectoryAsXML
GetDirectoryAsXML() As Character

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

Returns .F. on failure

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GetEntryByID
GetEntryByID(entryID As Numeric) As CkZipEntry

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 .F. on failure

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GetEntryByIndex
GetEntryByIndex(index As Numeric) As CkZipEntry

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

Returns .F. on failure

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GetEntryByName
GetEntryByName(entryName As Character) As CkZipEntry

Returns a ZipEntry by filename. If a full or partial path is part of the filename, this must be included in the entryName. Zip archives generally use forward slashes for directory separators. Use a forward slashes instead of backslash chars conventionally used in Windows.

Returns .F. on failure

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GetExclusions
GetExclusions() As CkStringArray

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

Returns .F. on failure

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GetExeConfigParam
GetExeConfigParam(name As Character) As Character

(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 .F. on failure

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GetMaxUncompressedSize
GetMaxUncompressedSize() As Character
Introduced in version 9.5.0.96

Returns the size of the file contained within the Zip that has the largest uncompressed size. The size is returned in string form because it could be larger than what can be held in a 32-bit unsigned integer, and we leave it to the application to convert the string to an integer number. (If necessary. Perhaps your application is only interested in the order of magnitude, which can be known by the length of the string.)

Returns .F. on failure

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InsertNew
InsertNew(fileName As Character, beforeIndex As Numeric) As CkZipEntry

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 .F. on failure

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IsNoCompressExtension
IsNoCompressExtension(fileExtension As Character) As Boolean

Returns .T. if the fileExtension is contained in the set of "no compress" extensions, otherwise returns .F.. (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
IsPasswordProtected(zipFilename As Character) As Boolean

Return True if a Zip file is password protected

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LoadTaskCaller
LoadTaskCaller(task As CkTask) As Boolean
Introduced in version 9.5.0.80

Loads the caller of the task's async method.

Returns .T. for success, .F. for failure.

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NewZip
NewZip(zipFilePath As Character) As Boolean

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.

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OpenBd
OpenBd(binData As CkBinData) As Boolean
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 .T.. 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 .T. for success, .F. for failure.

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OpenEmbedded
OpenEmbedded(exeFilename As Character, resourceName As Character) As Boolean

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

Returns .T. for success, .F. for failure.

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OpenMyEmbedded
OpenMyEmbedded(resourceName As Character) As Boolean

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

Returns .T. for success, .F. for failure.

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OpenZip
OpenZip(zipPath As Character) As Boolean

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 .T.. 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 .T. for success, .F. for failure.

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OpenZipAsync (1)
OpenZipAsync(zipPath As Character) As CkTask

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 .F. on failure

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QuickAppend
QuickAppend(ZipFileName As Character) As Boolean

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 .T. for success, .F. for failure.

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QuickAppendAsync (1)
QuickAppendAsync(ZipFileName As Character) As CkTask

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 .F. on failure

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RemoveEmbedded
RemoveEmbedded(exeFilename As Character, resourceName As Character) As Boolean

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

Returns .T. for success, .F. for failure.

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RemoveNoCompressExtension
RemoveNoCompressExtension(fileExtension As Character)

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
ReplaceEmbedded(exeFilename As Character, resourceName As Character, zipFilename As Character) As Boolean

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

Returns .T. for success, .F. for failure.

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SetCompressionLevel
SetCompressionLevel(level As Numeric)

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
SetExclusions(excludePatterns As CkStringArray)

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
SetExeConfigParam(paramName As Character, paramValue As Character)

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
SetPassword(password As Character)

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

Note: The SetPassword method has the effect of setting both the EncryptPassword 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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Unzip
Unzip(dirPath As Character) As Numeric

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)
UnzipAsync(dirPath As Character) As CkTask

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 .F. on failure

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UnzipInto
UnzipInto(dirPath As Character) As Numeric

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)
UnzipIntoAsync(dirPath As Character) As CkTask

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 .F. on failure

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UnzipMatching
UnzipMatching(dirPath As Character, pattern As Character, verbose As Boolean) As Numeric

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.

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UnzipMatchingAsync (1)
UnzipMatchingAsync(dirPath As Character, pattern As Character, verbose As Boolean) As CkTask

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 .F. on failure

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UnzipMatchingInto
UnzipMatchingInto(dirPath As Character, pattern As Character, verbose As Boolean) As Numeric

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

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UnzipMatchingIntoAsync (1)
UnzipMatchingIntoAsync(dirPath As Character, pattern As Character, verbose As Boolean) As CkTask

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 .F. on failure

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UnzipNewer
UnzipNewer(dirPath As Character) As Numeric

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)
UnzipNewerAsync(dirPath As Character) As CkTask

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 .F. on failure

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VerifyPassword
VerifyPassword() As Boolean

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

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WriteBd
WriteBd(binData As CkBinData) As Boolean
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 .T. for success, .F. for failure.

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WriteBdAsync (1)
WriteBdAsync(binData As CkBinData) As CkTask
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 .F. on failure

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WriteExe
WriteExe(exeFilename As Character) As Boolean

(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. (UNC paths, such as \\servername\path, are not supported.)
-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 .T. for success, .F. for failure.

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WriteExeAsync (1)
WriteExeAsync(exeFilename As Character) As CkTask

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

Returns .F. on failure

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WriteZip
WriteZip() As Boolean

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 .T. for success, .F. for failure.

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WriteZipAsync (1)
WriteZipAsync() As CkTask

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 .F. on failure

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WriteZipAndClose
WriteZipAndClose() As Boolean

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 .T. for success, .F. for failure.

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WriteZipAndCloseAsync (1)
WriteZipAndCloseAsync() As CkTask

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 .F. on failure

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