| DirectX SDK | 
The IDirectDraw7::RestoreDisplayMode method resets the mode of the display device hardware for the primary surface to what it was before the IDirectDraw7::SetDisplayMode method was called. Exclusive-level access is required to use this method.
HRESULT RestoreDisplayMode();
None.
If the method succeeds, the return value is DD_OK.
If it fails, the method can return one of the following error values:
| DDERR_GENERIC | 
| DDERR_INVALIDOBJECT | 
| DDERR_INVALIDPARAMS | 
| DDERR_LOCKEDSURFACES | 
| DDERR_NOEXCLUSIVEMODE | 
  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 98.
  Header: Declared in ddraw.h.
IDirectDraw7::SetDisplayMode, IDirectDraw7::EnumDisplayModes, IDirectDraw7::SetCooperativeLevel