WebSocket ActiveX Reference Documentation

WebSocket

Provides an API for implementing the client side of the WebSocket protocol.

Object Creation

(Visual Basic 6.0)
Dim obj As New ChilkatWebSocket

(ASP)
set obj = Server.CreateObject("Chilkat_9_5_0.WebSocket")

(VBScript)
set obj = CreateObject("Chilkat_9_5_0.WebSocket")

(Delphi)
obj := TChilkatWebSocket.Create(Self);

(FoxPro)
loObject = CreateObject('Chilkat_9_5_0.WebSocket')

(PowerBuilder)
lole_object = create oleobject
li_rc = lole_object.ConnectToNewObject("Chilkat_9_5_0.WebSocket")

(SQL Server)
EXEC @hr = sp_OACreate 'Chilkat_9_5_0.WebSocket', @obj OUT

(Javascript)
var obj = new ActiveXObject("Chilkat_9_5_0.WebSocket");

Properties

CloseAutoRespond As Long

Introduced in version 9.5.0.70

If 1, then a Close control frame is automatically sent in response to receiving a Close control frame (assuming that we did not initiate the Close in the first place). When the Close frame has both been received and sent, the underlying connection is automatically closed (as per the WebSocket protocol RFC specifications). Thus, if this property is 1, then two things automatically happen when a Close frame is received: (1) a Close frame is sent in response, and (2) the connection is closed.

The default value of this property is 1.

CloseReason As String (read-only)

Introduced in version 9.5.0.70

The reason string received with the Close frame, if any.

CloseReceived As Long (read-only)

Introduced in version 9.5.0.70

If 1, then a Close frame was already received on this websocket connection. If CloseAutoRespond is 0, then an application can check this property value to determine if a Close frame should be sent in response.

CloseStatusCode As Long (read-only)

Introduced in version 9.5.0.70

The status code received with the Close frame. If no status code was provided, or no Close frame has yet been received, then this property will be 0.

DebugLogFilePath As String

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.

FinalFrame As Long (read-only)

Introduced in version 9.5.0.70

1 if the last data frame received by calling ReadFrame was a final frame. Otherwise 0.

FrameDataLen As Long (read-only)

Introduced in version 9.5.0.70

The number of bytes accumulated from one or more calls to ReadFrame. Accumulated incoming frame data can be retrieved by calling GetFrameData, GetFrameDataSb, or GetFrameDataBd.

FrameOpcode As String (read-only)

Introduced in version 9.5.0.70

Indicates the type of frame received in the last call to ReadFrame. Possible values are "Continuation", "Text", "Binary", "Close", "Ping", or "Pong". Initially this property is set to the empty string because nothing has yet been received.

FrameOpcodeInt As Long (read-only)

Introduced in version 9.5.0.70

The integer value of the opcode (type of frame) received in the last call to ReadFrame. Possible values are:

0 - Continuation
1 - Text
2 - Binary
8 - Close
9 - Ping
10 - Pong

IdleTimeoutMs As Long

The maximum amount of time to wait for additional incoming data when receiving, or the max time to wait to send additional data. The default value is 30000 (30 seconds). This is not an overall max timeout. Rather, it is the maximum time to wait when receiving or sending has halted.

IsConnected As Long (read-only)

Introduced in version 9.5.0.70

Returns 1 if the websocket is connected. Otherwise returns 0.

LastBinaryResult As Variant (read-only)

Introduced in version 9.5.0.52

The binary data returned by the last (binary data returning) method called. Only available if Chilkat.Global.KeepBinaryResult is set to 1. This provides a means for obtaining large varbinary results in the SQL Server environment (where limitations exist in getting large amounts of data returned by method calls, but where temp tables can be used for binary properties).

LastErrorHtml As String (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.

LastErrorText As String (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.

Concept of LastErrorText

LastErrorText Standard Information

LastErrorXml As String (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.

LastMethodSuccess As Long

Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of 1 indicates success, a value of 0 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 = 1 and failure = 0.
  • 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 1. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

LastStringResult As String (read-only)

Introduced in version 9.5.0.52

The string return value of the last (string returning) method called. Only available if Chilkat.Global.KeepStringResult is set to 1. This provides a means for obtaining large string results in the SQL Server environment (where limitations exist in getting long strings returned by method calls, but where temp tables can be used for string properties).

Long Strings Returned by ActiveX Methods in SQL Server

LastStringResultLen As Long (read-only)

Introduced in version 9.5.0.53

The length, in characters, of the string contained in the LastStringResult property.

NeedSendPong As Long (read-only)

Introduced in version 9.5.0.70

If 1, then a Ping frame was received, but no Pong frame has yet been sent in response. The application should send a Pong frame by calling SendPong as soon as possible.

PingAutoRespond As Long

Introduced in version 9.5.0.70

If 1, then a Pong frame is automatically sent when a Ping frame is received. If set to 0, then the application may check the NeedSendPong property to determine if a Pong response is needed, and if so, may call the SendPong method to send a Pong.

Note: If this property is 1, then the ReadFrame method will auto-consume incoming Ping frames. In other words, ReadFrame will continue with reading the next incoming frame (thus Ping frames will never be returned to the application). This relieves the application from having to worry about receiving and handling spurious Ping frames.

The default value is 1.

PongAutoConsume As Long

Introduced in version 9.5.0.70

If 1, then incoming Pong frames are automatically consumed, and a call to ReadFrame will continue reading until it receives a non-Pong frame. The PongConsumed property can be checked to see if the last ReadFrame method call auto-consumed a Pong frame.

The default value is 1.

PongConsumed As Long (read-only)

Introduced in version 9.5.0.70

Is 1 if the last call to ReadFrame auto-consumed a Pong frame. This property is reset to 0 each time a ReadFrame method is called, and will get set to 1 if (1) the PongAutoConsume property is 1 and (2) a Pong frame was consumed within the ReadFrame method.

The purpose of PongAutoConsume and PongConsumed is to eliminate the concern for unanticipated Pong frames in the stream. In the websocket protocol, both sides (client and server) may send Pong frames at any time. In addition, if a Ping frame is sent, the corresponding Pong response frame can arrive at some unanticipated point later in the conversation. It's also possible, if several Ping frames are sent, that a Pong response frame is only sent for the most recent Ping frame. The default behavior of Chilkat's WebSocket API is to auto-consume incoming Pong frames and set this property to 1. This allows the application to call a ReadFrame method for whatever application data frame it may be expecting, without needing to be concerned if the next incoming frame is a Pong frame.

ReadFrameFailReason As Long (read-only)

Introduced in version 9.5.0.70

If the ReadFrame method returns 0, this property holds the fail reason. It can have one of the following values:

0 - No failure.
1 - Read Timeout.
2 - Aborted by Application Callback.
3 - Fatal Socket Error (Lost Connection).
4 - Received invalid WebSocket frame bytes.
99 - A catch-all for any unknown failure.  (Should not ever occur.  If it does, contact Chilkat.)

VerboseLogging As Long

If set to 1, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is 0. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

Version As String (read-only)

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

Methods

AddClientHeaders() As Long

Introduced in version 9.5.0.70

Adds the required WebSocket client-side open handshake headers. The headers specifically added to the previously specified REST object (in the call to UseConnection) are:

Upgrade: websocket
Connection: Upgrade
Sec-WebSocket-Key: ...
Sec-WebSocket-Version: 13

Returns 1 for success, 0 for failure.

(Classic ASP) WebSocket Connect

(Visual FoxPro) WebSocket Connect

(PowerBuilder) WebSocket Connect

(SQL Server) WebSocket Connect

(Visual Basic 6.0) WebSocket Connect

(VBScript) WebSocket Connect

CloseConnection() As Long

Introduced in version 9.5.0.70

Forcibly closes the underlying connection. This is a non-clean way to close the connection, but may be used if needed. The clean way to close a websocket is to send a Close frame, and then receive the Close response.

Returns 1 for success, 0 for failure.

GetFrameData() As String

Introduced in version 9.5.0.70

Returns the accumulated received frame data as a string. Calling GetFrameData clears the internal receive buffer.

Returns Nothing on failure

GetFrameDataBd(binData As ChilkatBinData) As Long

Introduced in version 9.5.0.70

Returns the accumulated received frame data in a BinData object. The received data is appended to the binData.

Calling this method clears the internal receive buffer.

(Classic ASP) WebSocket Send/Receive Binary Data

(Visual FoxPro) WebSocket Send/Receive Binary Data

(PowerBuilder) WebSocket Send/Receive Binary Data

(SQL Server) WebSocket Send/Receive Binary Data

(Visual Basic 6.0) WebSocket Send/Receive Binary Data

(VBScript) WebSocket Send/Receive Binary Data

GetFrameDataSb(sb As ChilkatStringBuilder) As Long

Introduced in version 9.5.0.70

Returns the accumulated received frame data in a StringBuilder object. The received data is appended to the sb.

Calling this method clears the internal receive buffer.

PollDataAvailable() As Long

Introduced in version 9.5.0.70

Check to see if data is available for reading on the websocket. Returns 1 if data is waiting and 0 if no data is waiting to be read.

ReadFrame() As Long

Introduced in version 9.5.0.70

Reads a single frame from the connected websocket. If a frame was successfuly received, then the following properties are set: FrameOpcode, FrameDataLen, FinalFrame, and the received frame data can be retrieved by calling GetFrameData, GetFrameDataSb, or GetFrameDataBd.

Returns 1 for success, 0 for failure.

(Classic ASP) Send and Receive WebSocket Frame

(Visual FoxPro) Send and Receive WebSocket Frame

(PowerBuilder) Send and Receive WebSocket Frame

(SQL Server) Send and Receive WebSocket Frame

(Visual Basic 6.0) Send and Receive WebSocket Frame

(VBScript) Send and Receive WebSocket Frame

(Classic ASP) Send and Receive WebSocket Messages

(Visual FoxPro) Send and Receive WebSocket Messages

(PowerBuilder) Send and Receive WebSocket Messages

(SQL Server) Send and Receive WebSocket Messages

(Visual Basic 6.0) Send and Receive WebSocket Messages

(VBScript) Send and Receive WebSocket Messages

ReadFrameAsync() As ChilkatTask

Introduced in version 9.5.0.70

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

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

VB6 Programs MUST Call FinalizeThreadPool Just Before Exiting

Asynchronous Methods in VB6 - Be Very Careful with Callbacks

(Classic ASP) How to Run an Asynchronous Task

(Visual FoxPro) How to Run an Asynchronous Task

(PowerBuilder) How to Run an Asynchronous Task

(SQL Server) How to Run an Asynchronous Task

(Visual Basic 6.0) How to Run an Asynchronous Task

(VBScript) How to Run an Asynchronous Task

SendClose(ByVal includeStatus As Long, ByVal statusCode As Long, reason As String) As Long

Introduced in version 9.5.0.70

Sends a Close control frame. If includeStatus is 1, then the statusCode is sent in the application data part of the Close frame. A Close reason may be provided only if includeStatus is 1. If this Close was sent to satisfy an already-received Close frame, then the underlying connection will also automatically be closed.

Note: If a status code and reason are provided, the utf-8 representation of the reason string must be 123 bytes or less. Chilkat will automatically truncate the reason to 123 bytes if necessary. Also, the status code must be an integer in the range 0 to 16383.

The WebSocket protocol specifies some pre-defined status codes at WebSocket Status Codes. For a normal closure, a status code value of 1000 should be used. The reason can be any string, as long as it is 123 bytes or less.

Returns 1 for success, 0 for failure.

SendCloseAsync(ByVal includeStatus As Long, ByVal statusCode As Long, reason As String) As ChilkatTask

Introduced in version 9.5.0.70

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

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

VB6 Programs MUST Call FinalizeThreadPool Just Before Exiting

Asynchronous Methods in VB6 - Be Very Careful with Callbacks

(Classic ASP) How to Run an Asynchronous Task

(Visual FoxPro) How to Run an Asynchronous Task

(PowerBuilder) How to Run an Asynchronous Task

(SQL Server) How to Run an Asynchronous Task

(Visual Basic 6.0) How to Run an Asynchronous Task

(VBScript) How to Run an Asynchronous Task

SendFrame(stringToSend As String, ByVal finalFrame As Long) As Long

Introduced in version 9.5.0.70

Sends a single data frame containing a string. If this is the final frame in a message, then finalFrame should be set to 1. Otherwise set finalFrame equal to 0.

Returns 1 for success, 0 for failure.

(Classic ASP) Send and Receive WebSocket Frame

(Visual FoxPro) Send and Receive WebSocket Frame

(PowerBuilder) Send and Receive WebSocket Frame

(SQL Server) Send and Receive WebSocket Frame

(Visual Basic 6.0) Send and Receive WebSocket Frame

(VBScript) Send and Receive WebSocket Frame

(Classic ASP) Send and Receive WebSocket Messages

(Visual FoxPro) Send and Receive WebSocket Messages

(PowerBuilder) Send and Receive WebSocket Messages

(SQL Server) Send and Receive WebSocket Messages

(Visual Basic 6.0) Send and Receive WebSocket Messages

(VBScript) Send and Receive WebSocket Messages

SendFrameAsync(stringToSend As String, ByVal finalFrame As Long) As ChilkatTask

Introduced in version 9.5.0.70

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

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

VB6 Programs MUST Call FinalizeThreadPool Just Before Exiting

Asynchronous Methods in VB6 - Be Very Careful with Callbacks

(Classic ASP) How to Run an Asynchronous Task

(Visual FoxPro) How to Run an Asynchronous Task

(PowerBuilder) How to Run an Asynchronous Task

(SQL Server) How to Run an Asynchronous Task

(Visual Basic 6.0) How to Run an Asynchronous Task

(VBScript) How to Run an Asynchronous Task

SendFrameBd(bdToSend As ChilkatBinData, ByVal finalFrame As Long) As Long

Introduced in version 9.5.0.70

Sends a single data frame containing binary data (the contents of bdToSend). If this is the final frame in a message, then finalFrame should be set to 1. Otherwise set finalFrame equal to 0.

Returns 1 for success, 0 for failure.

(Classic ASP) WebSocket Send/Receive Binary Data

(Visual FoxPro) WebSocket Send/Receive Binary Data

(PowerBuilder) WebSocket Send/Receive Binary Data

(SQL Server) WebSocket Send/Receive Binary Data

(Visual Basic 6.0) WebSocket Send/Receive Binary Data

(VBScript) WebSocket Send/Receive Binary Data

SendFrameBdAsync(bdToSend As ChilkatBinData, ByVal finalFrame As Long) As ChilkatTask

Introduced in version 9.5.0.70

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

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

VB6 Programs MUST Call FinalizeThreadPool Just Before Exiting

Asynchronous Methods in VB6 - Be Very Careful with Callbacks

(Classic ASP) How to Run an Asynchronous Task

(Visual FoxPro) How to Run an Asynchronous Task

(PowerBuilder) How to Run an Asynchronous Task

(SQL Server) How to Run an Asynchronous Task

(Visual Basic 6.0) How to Run an Asynchronous Task

(VBScript) How to Run an Asynchronous Task

SendFrameSb(sbToSend As ChilkatStringBuilder, ByVal finalFrame As Long) As Long

Introduced in version 9.5.0.70

Sends a single data frame containing a string (the contents of sbToSend). If this is the final frame in a message, then finalFrame should be set to 1. Otherwise set finalFrame equal to 0.

Returns 1 for success, 0 for failure.

SendFrameSbAsync(sbToSend As ChilkatStringBuilder, ByVal finalFrame As Long) As ChilkatTask

Introduced in version 9.5.0.70

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

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

VB6 Programs MUST Call FinalizeThreadPool Just Before Exiting

Asynchronous Methods in VB6 - Be Very Careful with Callbacks

(Classic ASP) How to Run an Asynchronous Task

(Visual FoxPro) How to Run an Asynchronous Task

(PowerBuilder) How to Run an Asynchronous Task

(SQL Server) How to Run an Asynchronous Task

(Visual Basic 6.0) How to Run an Asynchronous Task

(VBScript) How to Run an Asynchronous Task

SendPing(pingData As String) As Long

Introduced in version 9.5.0.70

Sends a Ping control frame, optionally including text data. If pingData is non-empty, the utf-8 representation of the string must be 125 bytes or less. Chilkat will automatically truncate the pingData to 125 bytes if necessary.

Returns 1 for success, 0 for failure.

(Classic ASP) Send a WebSocket Ping Control Frame

(Visual FoxPro) Send a WebSocket Ping Control Frame

(PowerBuilder) Send a WebSocket Ping Control Frame

(SQL Server) Send a WebSocket Ping Control Frame

(Visual Basic 6.0) Send a WebSocket Ping Control Frame

(VBScript) Send a WebSocket Ping Control Frame

SendPingAsync(pingData As String) As ChilkatTask

Introduced in version 9.5.0.70

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

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

VB6 Programs MUST Call FinalizeThreadPool Just Before Exiting

Asynchronous Methods in VB6 - Be Very Careful with Callbacks

(Classic ASP) How to Run an Asynchronous Task

(Visual FoxPro) How to Run an Asynchronous Task

(PowerBuilder) How to Run an Asynchronous Task

(SQL Server) How to Run an Asynchronous Task

(Visual Basic 6.0) How to Run an Asynchronous Task

(VBScript) How to Run an Asynchronous Task

SendPong() As Long

Introduced in version 9.5.0.70

Sends a Pong control frame. If this Pong frame is sent to satisfy an unresponded-to Ping frame, then the previously received Ping data is automatically sent in this Pong frame.

Returns 1 for success, 0 for failure.

SendPongAsync() As ChilkatTask

Introduced in version 9.5.0.70

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

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

VB6 Programs MUST Call FinalizeThreadPool Just Before Exiting

Asynchronous Methods in VB6 - Be Very Careful with Callbacks

(Classic ASP) How to Run an Asynchronous Task

(Visual FoxPro) How to Run an Asynchronous Task

(PowerBuilder) How to Run an Asynchronous Task

(SQL Server) How to Run an Asynchronous Task

(Visual Basic 6.0) How to Run an Asynchronous Task

(VBScript) How to Run an Asynchronous Task

UseConnection(connection As ChilkatRest) As Long

Introduced in version 9.5.0.70

Initializes the connection for a WebSocket session. All WebSocket sessions begin with a call to UseConnection. A Chilkat REST object is used for the connection because the WebSocket handshake begins with an HTTP GET request. The Chilkat REST API provides the ability to add custom headers, authentication, etc. to the opening GET handshake. It also provides the ability to establish connections over TLS or SSH and to benefit from the rich set of features already present relating to HTTP proxies, SOCKS proxies, bandwidth throttling, IPv6, socket options, etc.

Returns 1 for success, 0 for failure.

(Classic ASP) WebSocket Connect

(Visual FoxPro) WebSocket Connect

(PowerBuilder) WebSocket Connect

(SQL Server) WebSocket Connect

(Visual Basic 6.0) WebSocket Connect

(VBScript) WebSocket Connect

(Classic ASP) WebSocket over TLS

(Visual FoxPro) WebSocket over TLS

(PowerBuilder) WebSocket over TLS

(SQL Server) WebSocket over TLS

(Visual Basic 6.0) WebSocket over TLS

(VBScript) WebSocket over TLS

(Classic ASP) WebSocket through SSH Tunnel

(Visual FoxPro) WebSocket through SSH Tunnel

(PowerBuilder) WebSocket through SSH Tunnel

(SQL Server) WebSocket through SSH Tunnel

(Visual Basic 6.0) WebSocket through SSH Tunnel

(VBScript) WebSocket through SSH Tunnel

ValidateServerHandshake() As Long

Introduced in version 9.5.0.70

Called after sending the opening handshake from the Rest object. Validates the server's response to the opening handshake message. If validation is successful, the application may begin sending and receiving data and control frames.

Returns 1 for success, 0 for failure.

(Classic ASP) WebSocket Connect

(Visual FoxPro) WebSocket Connect

(PowerBuilder) WebSocket Connect

(SQL Server) WebSocket Connect

(Visual Basic 6.0) WebSocket Connect

(VBScript) WebSocket Connect

Events

AbortCheck(abort As Long)

Provides the opportunity for a method call to be aborted. The AbortCheck event is fired periodically based on the value of the HeartbeatMs property. If HeartbeatMs is 0, then no AbortCheck events will fire. As an example, to fire 5 AbortCheck events per second, set the HeartbeatMs property equal to 200.

VB6 Event callback implementation:

Important: Event callbacks from asynchronous method calls are generally not possible from the ActiveX. See VB6 Async Callbacks

Dim WithEvents myWebsocket As ChilkatWebSocket

Private Sub myWebsocket_AbortCheck(abort As Long)

	'Insert application code here.

End Sub

BinaryData(data As Variant)

Binary data provided by certain methods.

VB6 Event callback implementation:

Important: Event callbacks from asynchronous method calls are generally not possible from the ActiveX. See VB6 Async Callbacks

Dim WithEvents myWebsocket As ChilkatWebSocket

Private Sub myWebsocket_BinaryData(data As Variant)

	'Insert application code here.

End Sub

PercentDone(ByVal pctDone As Long, abort As Long)

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 event is only fired 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 operations (Chilkat method calls) 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).

The PercentDone callback counts as an AbortCheck event. For method calls that complete quickly such that PercentDone events fire, it may be that AbortCheck events don't fire because the opportunity to abort is already provided in the PercentDone callback. For time consuming operations, where the amount of time between PercentDone callbacks are long, AbortCheck callbacks may be used to allow for the operation to be aborted in a more responsive manner.

The abort output argument provides a means for aborting the operation. Setting it to 1 will cause the method to abort and return a failed status (or whatever return value indicates failure).

VB6 Event callback implementation:

Important: Event callbacks from asynchronous method calls are generally not possible from the ActiveX. See VB6 Async Callbacks

Dim WithEvents myWebsocket As ChilkatWebSocket

Private Sub myWebsocket_PercentDone(ByVal pctDone As Long, abort As Long)

	'Insert application code here.

End Sub

ProgressInfo(name As String, value As String)

A general name/value event that provides information about what is happening during a method call. To find out what information is available, write code to handle this event and log the name/value pairs. Most are self-explanatory.

VB6 Event callback implementation:

Important: Event callbacks from asynchronous method calls are generally not possible from the ActiveX. See VB6 Async Callbacks

Dim WithEvents myWebsocket As ChilkatWebSocket

Private Sub myWebsocket_ProgressInfo(name As String, value As String)

	'Insert application code here.

End Sub

TextData(data As String)

Text data provided by certain methods.

VB6 Event callback implementation:

Important: Event callbacks from asynchronous method calls are generally not possible from the ActiveX. See VB6 Async Callbacks

Dim WithEvents myWebsocket As ChilkatWebSocket

Private Sub myWebsocket_TextData(data As String)

	'Insert application code here.

End Sub