Creates a new clipping region that consists of the existing clipping region minus the specified rectangle
#include <WinAPIGdi.au3>
_WinAPI_ExcludeClipRect ( $hDC, $tRECT )
| $hDC | Handle to the device context. |
| $tRECT | $tagRECT structure that contains the logical coordinates of the specified rectangle. |
| Success: | The value that specifies the new clipping region's complexity; it can be one of the following values. $COMPLEXREGION $NULLREGION $SIMPLEREGION |
| Failure: | 0. |
Search ExcludeClipRect in MSDN Library.