The IDirectInputDevice::GetCapabilities method obtains the capabilities of the DirectInputDevice object.
HRESULT GetCapabilities(
  LPDIDEVCAPS lpDIDevCaps  
);
 If the method succeeds, the return value is DI_OK.
If the method fails, the return value may be one of the following error values:
| DIERR_INVALIDPARAM | 
| DIERR_NOTINITIALIZED | 
For compatibility with DirectX 3, it is also valid to pass a DIDEVCAPS_DX3 structure with the dwSize member initialized to sizeof(DIDEVCAPS_DX3). For more information, see Designing for Previous Versions of DirectInput.
  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in dinput.h.
  Import Library: Use dinput.lib.