protected unsafe void EnableActionSetNextAVTransportURI()
        {
            iCallbackSetNextAVTransportURI = new CallbackSetNextAVTransportURI(DoSetNextAVTransportURI);
            IntPtr ptr = GCHandle.ToIntPtr(iGch);

            DvServiceUpnpOrgAVTransport2EnableActionSetNextAVTransportURI(iHandle, iCallbackSetNextAVTransportURI, ptr);
        }
 static extern void DvServiceUpnpOrgAVTransport2EnableActionSetNextAVTransportURI(uint aHandle, CallbackSetNextAVTransportURI aCallback, IntPtr aPtr);