Wait for a Socket to Become Writable

See more Socket/SSL/TLS Examples

Demonstrates Socket.SelectForWriting, which waits for the socket, or sockets in a socket set, to become writable. It returns 1 if writable, 0 on timeout, or -1 on error.

Dim success As Boolean = False

Dim socket As New Chilkat.Socket

'  Connect to the server using TLS.
Dim bTls As Boolean = True
Dim maxWaitMs As Integer = 5000
success = socket.Connect("example.com",5000,bTls,maxWaitMs)
If (success = False) Then
    Debug.WriteLine(socket.LastErrorText)
    Exit Sub
End If


'  Wait up to 5 seconds for the socket (or sockets in a socket set) to become writable.  Returns 1 if
'  writable, 0 on timeout, or -1 on error.
Dim ready As Integer = socket.SelectForWriting(5000)
If (ready < 0) Then
    Debug.WriteLine(socket.LastErrorText)
    Exit Sub
End If

If (ready <> 1) Then
    Debug.WriteLine("The socket did not become writable before the timeout.")
    Exit Sub
End If

Debug.WriteLine("The socket is ready for writing.")