I suspect many people would be interested. I've always wanted to see how that communication works.
https://www.robot-forum.com/robotforum/kuk…99954/#msg99954
This program already using CrossComm interface. Latency time approximative 10ms for one variable. Of course all Windows programs doesn't have real time feautre and latency time may differ. If you need time critical applications you must be use RSI or realtime fieldbus.
good! We have a similar internal tool . 
Thanks for your comment. We are developing and using CrossComm interface on too many robots but I mean CrossComm running on Windows base and does not meet realtime specifications. Yes it communicate directly to VxWin and faster then kuka gateway etc. If you don't need realtime you can use safely.
The native interface is limited. you could not call it in remote device. But if using remote interface, you also call it in the local host.
Besides, you have to consider how integrate your app GUI into the SmartHMI.
