Check Whether a Socket Is Writable

See more Socket/SSL/TLS Examples

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 fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

set socket = CreateObject("Chilkat.Socket")

'  Connect to the server using TLS.
bTls = 1
maxWaitMs = 5000
success = socket.Connect("example.com",5000,bTls,maxWaitMs)
If (success = 0) Then
    outFile.WriteLine(socket.LastErrorText)
    WScript.Quit
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.
writable = socket.CheckWriteable(5000)
If (writable < 0) Then
    outFile.WriteLine(socket.LastErrorText)
    WScript.Quit
End If

If (writable <> 1) Then
    outFile.WriteLine("The socket did not become writable before the timeout.")
    WScript.Quit
End If

outFile.WriteLine("The socket is writable.")

outFile.Close