The IDirect3DDevice3::GetCaps method retrieves the capabilities of the Direct3D device.
HRESULT GetCaps(
  LPD3DDEVICEDESC lpD3DHWDevDesc,  
  LPD3DDEVICEDESC lpD3DHELDevDesc  
);
 If the method succeeds, the return value is D3D_OK.
If the method fails, the return value may be one of the following values:
| DDERR_INVALIDOBJECT | 
| DDERR_INVALIDPARAMS | 
This method does not retrieve the capabilities of the display device. To retrieve this information, use the IDirectDraw4::GetCaps method.
This method is unchanged from its implementation in the IDirect3DDevice interface.
  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in d3d.h.
  Import Library: Use ddraw.lib.