HRESULT GetDisplayMode(LPDDSURFACEDESC lpDDSurfaceDesc);
Retrieves the current display mode.
·Returns DD_OK if successful, or one of the following error values otherwise:
lpDDSurfaceDesc
Address of a DDSURFACEDESC structure that will be filled with a description of the surface.
An application should not save the information returned by this method to restore the display mode on clean-up. The application should use the IDirectDraw2::RestoreDisplayMode method to restore the mode on clean-up, thereby avoiding mode-setting conflicts that could arise in a multiprocess environment.