|Microsoft DirectX 9.0|
The GetMonitorFrequency method returns the frequency of the monitor being driven by the DirectDraw object.
HRESULT GetMonitorFrequency( LPDWORD lpdwFrequency );
Points to the DWORD that will be filled in with the monitor frequency, in 100-Hz units. (For example, 60 Hz is returned as 6000.)
|DD_OK||The method succeeded.|
|DDERR_INVALIDOBJECT||DirectDraw received a pointer that was an invalid DirectDraw object.|
|DDERR_INVALIDPARAMS||One or more of the input parameters is invalid.|
|DDERR_UNSUPPORTED||Action not supported.|