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IDirectDrawClipper::SetClipList

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This method sets or deletes the clip list used by the IDirectDrawSurface5::Blt and IDirectDrawSurface5::UpdateOverlay methods on surfaces to which the parent DirectDrawClipper object is attached.

HRESULT SetClipList(
  LPRGNDATA lpClipList, 
  DWORD dwFlags
); 

Parameters

  • lpClipList
    Either an address to a valid RGNDATA structure or NULL. If there is an existing clip list associated with the DirectDrawClipper object and this value is NULL, the clip list will be deleted.
  • dwFlags
    This parameter is currently not used and must be set to zero.

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_CLIPPERISUSINGHWND
DDERR_INVALIDCLIPLIST
DDERR_INVALIDOBJECT
DDERR_INVALIDPARAMS
DDERR_OUTOFMEMORY

Remarks

The clip list cannot be set if a window handle is already associated with the DirectDrawClipper object.

The RGNDATA structure used with this method has the following syntax.

typedef struct _RGNDATA { 
  RGNDATAHEADER rdh; 
  char Buffer[1]; 
} RGNDATA; 

The rdh member of the RGNDATA structure is an RGNDATAHEADER structure that has the following syntax.

typedef struct _RGNDATAHEADER { 
  DWORD dwSize; 
  DWORD iType; 
  DWORD nCount; 
  DWORD nRgnSize; 
  RECT rcBound; 
} RGNDATAHEADER; 

For more information about these structures, see the documentation in the Platform Software Development Kit.

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

IDirectDrawClipper::GetClipList | IDirectDrawSurface5::Blt | IDirectDrawSurface5::UpdateOverlay

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