Check Whether a Socket Is Writable

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Demonstrates Socket.CheckWriteable, which waits for the connected socket to become writable. It returns 1 if writable, 0 if it did not become writable before the timeout, or -1 on error.

Dim success As Boolean
success = False

Dim socket As New Chilkat.Socket

//  Connect to the server using TLS.
Dim bTls As Boolean
bTls = True
Dim maxWaitMs As Int32
maxWaitMs = 5000
success = socket.Connect("example.com",5000,bTls,maxWaitMs)
If (success = False) Then
    System.DebugLog(socket.LastErrorText)
    Return
End If

//  Wait up to 5 seconds for the socket to become writable.  Returns 1 if writable, 0 if it did not
//  become writable before the timeout, or -1 on error.
Dim writable As Int32
writable = socket.CheckWriteable(5000)
If (writable < 0) Then
    System.DebugLog(socket.LastErrorText)
    Return
End If

If (writable <> 1) Then
    System.DebugLog("The socket did not become writable before the timeout.")
    Return
End If

System.DebugLog("The socket is writable.")