private void TestLocked() { int hr; bool bLocked, bLocked2; hr = m_pVideoGroupObj.GetLocked(out bLocked); DESError.ThrowExceptionForHR(hr); hr = m_pVideoGroupObj.SetLocked(!bLocked); DESError.ThrowExceptionForHR(hr); hr = m_pVideoGroupObj.GetLocked(out bLocked2); DESError.ThrowExceptionForHR(hr); Debug.Assert(bLocked != bLocked2, "Locked"); }