public:
     virtual bool __fastcall DuplicateSurface( TDx_DrawSurface* pSurface, TDx_DrawSurface* pDupSurface );

• Description
• Parameters
• See Also

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The TDx_Draw::DuplicateSurface method will duplicate an existing surface.

The new surface will reference the same surface memory as the existing surface and function in an identical manner to the original.

The surface memory will be released when there is no longer anything referencing it.
Primary, 3-D or implicitly created surfaces cannot be duplicated.

If the method call fails, the OnError event will be triggered with one of the following values:
DDERR_CANTDUPLICATE
DDERR_INVALIDOBJECT
DDERR_INVALIDPARAMS
DDERR_OUTOFMEMORY
DDERR_SURFACELOST

Surface
The Surface parameter references an existing surface that is to be duplicated.

DupSurface
The DupSurface parameter will reference the duplicate surface if this method returns successfully.

TDx_DrawSurface