Removes an event hook function
#include <WinAPISys.au3>
_WinAPI_UnhookWinEvent ( $hEventHook )
| $hEventHook | Handle to the event hook returned in the previous call to _WinAPI_SetWinEventHook(). | 
| Success: | True. | 
| Failure: | False. | 
Search UnhookWinEvent in MSDN Library.