Hello Intaris,
I scattered my questions, because I received not answer from anyone (except you of course). I tried to find an answer making the same question in another posts, but which were related to the theme!
About my code, you can find it in this post:
http://forums.ni.com/t5/LabVIEW/activex-Reg-Event-Callback-Leds/td-p/3164409
please let me know, if you can understand the problem now....
thanks,