IDirectDrawSurface::Unlock
This method notifies DirectDraw that the direct surface manipulations are complete.
HRESULT Unlock(
LPRECT lpRect
);
Parameters
- lpRect
Address of the RECT structure that was used to lock the surface in the corresponding call to the IDirectDrawSurface::Lock method. This parameter can be NULL only if the entire surface was locked by passing NULL in the lpDestRect parameter of the corresponding call to the IDirectDrawSurface::Lock method.
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_GENERIC |
| DDERR_INVALIDOBJECT |
| DDERR_INVALIDPARAMS |
| DDERR_INVALIDRECT |
| DDERR_NOTLOCKED |
| DDERR_SURFACELOST |
Remarks
Because it is possible to call IDirectDrawSurface::Lock multiple times for the same surface with different destination rectangles, the pointer in lpRect links the calls to the IDirectDrawSurface::Lock and IDirectDrawSurface::Unlock methods.
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
Send Feedback on this topic to the authors