private void TestType() { int hr; TimelineMajorType t; hr = m_pVideoGroupObj.GetTimelineType(out t); DESError.ThrowExceptionForHR(hr); Debug.Assert(t == TimelineMajorType.Group, "TimelineType"); hr = m_pVideoGroupObj.SetTimelineType(TimelineMajorType.Effect); Debug.Assert(hr == E_INVALIDARG, "Not supported"); }