8/28/2008 This method creates a DirectDrawClipper object.
HRESULT CreateClipper(
DWORD dwFlags,
LPDIRECTDRAWCLIPPER FAR* lplpDDClipper,
IUnknown FAR* pUnkOuter
);
- dwFlags
-
This parameter is currently not used and must be set to zero.
- lplpDDClipper
-
Address of a variable that will be set to a valid IDirectDrawClipper interface pointer if the call succeeds.
- pUnkOuter
-
Allows for future compatibility with COM aggregation functionality. Presently, this method will return CLASS_E_NOAGGREGATION if this parameter is anything but NULL.
If the method succeeds, the return value is DD_OK.
If the method fails, the return value may be one of the following error values:
| DDERR_INVALIDOBJECT |
| DDERR_INVALIDPARAMS |
| DDERR_NOCOOPERATIVELEVELSET |
| DDERR_OUTOFMEMORY |
For more information on these error codes see DirectDraw Return Values.
The DirectDrawClipper object can be attached to a DirectDrawSurface and used during IDirectDrawSurface::Blt and IDirectDrawSurface::UpdateOverlay operations.
To create a DirectDrawClipper object that is not owned by a specific DirectDraw object, use the DirectDrawCreateClipper function.
| Header | ddraw.h |
| Library | ddraw.lib |
| Windows Embedded CE | Windows Embedded CE 6.0 and later |
| Windows Mobile | Pocket PC for Windows Mobile Version 5.0 and later, Smartphone for Windows Mobile Version 5.0 and later |
Reference
IDirectDrawSurface::GetClipper
IDirectDrawSurface::SetClipper