protected unsafe void EnableActionGetStateVariables()
        {
            iCallbackGetStateVariables = new CallbackGetStateVariables(DoGetStateVariables);
            IntPtr ptr = GCHandle.ToIntPtr(iGch);

            DvServiceUpnpOrgAVTransport2EnableActionGetStateVariables(iHandle, iCallbackGetStateVariables, ptr);
        }
 static extern void DvServiceUpnpOrgAVTransport2EnableActionGetStateVariables(uint aHandle, CallbackGetStateVariables aCallback, IntPtr aPtr);