IDirectDrawSurface::Unlock (Compact 2013)
3/26/2014
This method notifies DirectDraw that the direct surface manipulations are complete.
Syntax
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 Value
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 |
For more information on these error codes, see DirectDraw Return Values.
Sample Code
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
Header |
ddraw.h |
Library |
ddraw.lib |
See Also
Reference
IDirectDrawSurface
DirectDraw Reference
DirectDraw Interfaces
IDirectDrawSurface::Lock