protected unsafe void EnableActionGetTransportInfo()
        {
            iCallbackGetTransportInfo = new CallbackGetTransportInfo(DoGetTransportInfo);
            IntPtr ptr = GCHandle.ToIntPtr(iGch);

            DvServiceUpnpOrgAVTransport2EnableActionGetTransportInfo(iHandle, iCallbackGetTransportInfo, ptr);
        }
 static extern void DvServiceUpnpOrgAVTransport2EnableActionGetTransportInfo(uint aHandle, CallbackGetTransportInfo aCallback, IntPtr aPtr);