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VBScript Examples

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(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")
Set outFile = fso.CreateTextFile("output.txt", True)

set listenSocket = CreateObject("Chilkat_9_5_0.Socket")

success = listenSocket.UnlockComponent("Anything for 30-day trial")
If (success <> 1) Then
    outFile.WriteLine(listenSocket.LastErrorText)
    WScript.Quit
End If

'  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

 

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