have fun! 
#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
GUICreate("Form1", 615, 227)
$Mainlist = GUICtrlCreateList("", -1, -1, 615, 227)
GUISetState()
Global $TCPAccept
TCPStartup()
$MainSocket = TCPListen(@IPAddress1, 1234)
_TCPAccept()
While 1
	$TCPRecv = TCPRecv($TCPAccept, 9)
	If @error Then
		GUICtrlSetData($Mainlist, "")
		_TCPAccept()
		ContinueLoop
	EndIf
	If $TCPRecv <> "" Then GUICtrlSetData($Mainlist, $TCPRecv)
	Sleep(100)
WEnd
Func _TCPAccept()
	GUICtrlSetData($Mainlist, "Off")
	Do
		$TCPAccept = TCPAccept($MainSocket)
	Until $TCPAccept <> -1
	GUICtrlSetData($Mainlist, "")
EndFunc   ;==>_TCPAccept