private void TestModifyStop2()
        {
            int            hr;
            double         l1, l2;
            IAMTimelineObj pObj = (IAMTimelineObj)m_pSource1Src;

            hr = m_pSource1Src.ModifyStopTime2(1200.56);
            DESError.ThrowExceptionForHR(hr);

            hr = pObj.GetStartStop2(out l1, out l2);
            DESError.ThrowExceptionForHR(hr);

            Debug.Assert(l2 == 1200.56, "ModifyStopTime2");
        }