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Retrieves video image size information.
HRESULT GetImageSize( VIDEOINFOHEADER * pVideoInfo , long * pBufferSize , RECT * pSourceRect );
Returns an HRESULTvalue.
This member function is a helper function used for creating memory image renderings of DIB images. It is called from the base class implementation of CBaseControlVideo::GetCurrentImagewhen a null pVideoImageparameter is passed to that member function. As a result, this member function constructs and returns a VIDEOINFOHEADERstructure, using the information in pBufferSizeand pSourceRect.