private static extern HRESULT _DwmGetCompositionTimingInfo(IntPtr hwnd, ref DWM_TIMING_INFO pTimingInfo);
internal static DWM_TIMING_INFO? DwmGetCompositionTimingInfo(IntPtr hwnd)
{
if (!Utility.IsOSVistaOrNewer)
{
// API was new to Vista.
return null;
}
var dti = new DWM_TIMING_INFO {cbSize = Marshal.SizeOf(typeof (DWM_TIMING_INFO))};
var hr = _DwmGetCompositionTimingInfo(hwnd, ref dti);
if (hr == HRESULT.E_PENDING)
{
// The system isn't yet ready to respond. Return null rather than throw.
return null;
}
hr.ThrowIfFailed();
return dti;
}