Fills a region by using the specified brush
#include <WinAPIGdi.au3>
_WinAPI_FillRgn ( $hDC, $hRgn, $hBrush )
| $hDC | Handle to the device context. |
| $hRgn | Handle to the region to be filled. The region's coordinates are presumed to be in logical units. |
| $hBrush | Handle to the brush to be used to fill the region. |
| Success: | True |
| Failure: | False |
Search FillRgn in MSDN Library.