IDirectDraw::CreateClipper
This method creates a DirectDrawClipper object.
HRESULT CreateClipper(
DWORD dwFlags,
LPDIRECTDRAWCLIPPER FAR* lplpDDClipper,
IUnknown FAR* pUnkOuter
);
Parameters
- 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.
Return Values
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 |
Remarks
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.
Requirements
Pocket PC: Windows Mobile 5.0 and later
Smartphone: Windows Mobile 5.0 and later
OS Versions: Windows CE 5.01 and later
Header: Ddraw.h.
Library: Ddraw.lib.
See Also
IDirectDrawSurface::GetClipper | IDirectDrawSurface::SetClipper
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