Hey folks, I just explored the new helpfile and found a new Keyword (dunno if its that new, but i never saw it before) called Volatile. It was made especally for CallBack and Com event functions, so I wanted to try that out. the advantage of this Keyword is, that you can run the Dll while you can do other things in autoit (AutoIt wont freeze/pause anymore while the dllcall is executed!) I made up a little example i want to share with you, the c source is compiled in MinGW, you need at least