Sets the aspect that a rich edit control uses to draw an object. This call does not change the drawing information cached in the object; this must be done by the caller. The call does cause the object to be redrawn.
HRESULT SetDvaspect(
  LONG iob,       
  DWORD dvaspect  
);
 Returns success status. Use GetScode to retrieve an SCODE. Can be S_OK on success or E_INVALIDARG if the index is invalid.
  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in richole.h.
Rich Edit Controls Overview, Rich Edit OLE Interfaces, IRichEditOle