Nuta
Dostęp do tej strony wymaga autoryzacji. Możesz spróbować się zalogować lub zmienić katalog.
Dostęp do tej strony wymaga autoryzacji. Możesz spróbować zmienić katalogi.
The ExcludeUpdateRgn function prevents drawing within invalid areas of a window by excluding an updated region in the window from a clipping region.
Syntax
int ExcludeUpdateRgn(
[in] HDC hDC,
[in] HWND hWnd
);
Parameters
[in] hDC
Handle to the device context associated with the clipping region.
[in] hWnd
Handle to the window to update.
Return value
The return value specifies the complexity of the excluded region; it can be any one of the following values.
| Value | Meaning |
|---|---|
| COMPLEXREGION | Region consists of more than one rectangle. |
| ERROR | An error occurred. |
| NULLREGION | Region is empty. |
| SIMPLEREGION | Region is a single rectangle. |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | winuser.h (include Windows.h) |
| Library | User32.lib |
| DLL | User32.dll |