dust shoe dialog during auto tool measurement

Hi Everyone,
I have built a PrintNC machine with a dust shoe that is independent of the Z motion. I also implemented auto tool measurement with a tool height sensor in GMOCCAPY. To perform the tool change and height measurement, I have to remove the dust shoe when I change the tool and then set it back after the tool has been measured and the machine continues to work. What I would like to do now is that after the tool is measured, the machine would go to the x,y position without starting the spindle and pop out a message in an "okdialog" instructing me to set the dust shoe. Then, after I would click "ok", the machine would continue working (start the spindle, lower the z, and work).

What would be the easiest solution to do implement this additional stop and dialog? I would appreciate any help. Many thanks.

I would do that using the gmoccapy user message funktions.

It is well documented (IMHO)??

Norbert