Don't understand your question, what do you want to happen to changes in the clipboard, you had already shown how to respond to any changes in the clipboard, here is a slightly modified version.
Global $sClip, $sCurClip
While 1
$sClip = ClipGet()
If $sClip <> $sCurClip Then
If IsString($sClip) Then
MsgBox(4096, "Clip Info", $sClip)
$sCurClip = $sClip
EndIf
EndIf
Sleep(250)
WEnd