dmDeviceMCNChange
tddmReportDevice(dmRoot, onePortContext->dmPortContext, &oneDeviceData->dmDeviceInfo, &oneAttachedExpDeviceData->dmDeviceInfo, dmDeviceMCNChange);
tddmReportDevice(dmRoot, onePortContext->dmPortContext, &oneDeviceData->dmDeviceInfo, agNULL, dmDeviceMCNChange);
else if (flag == dmDeviceMCNChange)