(VBScript) Bind and Listen on a Randomly Selected Unused Port

Demonstrates how to bind and listen on a randomly selected unused port.

Note:The ListenPort property used in this example is available starting in Chilkat v9.5.0.59.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

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

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Socket")
set listenSocket = CreateObject("Chilkat.Socket")

' Pass a value of 0 for the port number to randomly select
' an unused port.
' (The 2nd argument allows for a backlog of 25 pending connection requests when accepting connections.)
success = listenSocket.BindAndListen(5555,25)
If (success <> 1) Then
    outFile.WriteLine(listenSocket.LastErrorText)
    WScript.Quit
End If

' Find out what port was chosen.
' Note: The ListenPort propety was added in Chilkat v9.5.0.59
listenPort = listenSocket.ListenPort
outFile.WriteLine("Chosen listen port = " & listenPort)

outFile.Close