Function Reference


Retrieves the update region of a window by copying it into the specified region

#include <WinAPIGdi.au3>
_WinAPI_GetUpdateRgn ( $hWnd, $hRgn [, $bErase = True] )


$hWnd Handle to the window with an update region that is to be retrieved.
$hRgn Handle to the region to receive the update region.
$bErase [optional] Specifies whether the background in the update region is to be erased, valid values:
    True - The background is erased (Default).
    False - The background remains unchanged.

Return Value

Success: The value that indicates the complexity of the resulting region; it can be one of the following values.
Failure: 0.


_WinAPI_BeginPaint() automatically validates the update region, so any call to _WinAPI_GetUpdateRgn() made
immediately after the call to _WinAPI_BeginPaint() retrieves an empty update region.



See Also

Search GetUpdateRgn in MSDN Library.