Frees a hot key previously registered by the calling thread
#include <WinAPISys.au3>
_WinAPI_UnregisterHotKey ( $hWnd, $iID )
| $hWnd | Handle to the window associated with the hot key to be freed. This parameter should be 0 if the hot key is not associated with a window. |
| $iID | Specifies the identifier of the hot key to be freed. |
| Success: | True |
| Failure: | False |
Search UnregisterHotKey in MSDN Library.