Obtains a copy of the window region of a window
#include <WinAPIGdi.au3>
_WinAPI_GetWindowRgn ( $hWnd, $hRgn )
| $hWnd | Handle to the window whose window region is to be obtained. |
| $hRgn | Handle to the region which will be modified to represent the window region. |
| Success: | Specifies the type of the region that the function obtains. It can be one of the following values $NULLREGION - The region is empty. $SIMPLEREGION - The region is a single rectangle. $COMPLEXREGION - The region is more than one rectangle. |
| Failure: | 0 The specified window does not have a region, or an error occurred while attempting to return the region. |
The window region of a window is set by calling the SetWindowRgn function.
The window region determines the area within the window where the system permits drawing.
The system does not display any portion of a window that lies outside of the window region
The coordinates of a window's window region are relative to the upper-left corner of the window, not the client area of the window.
To set the window region of a window, call the SetWindowRgn function.
_WinAPI_CombineRgn, _WinAPI_CreateRectRgn, _WinAPI_CreateRoundRectRgn, _WinAPI_SetWindowRgn
Search GetWindowRgn in MSDN Library.