Ever happened to you to have blocked app? Window just stopped responding? In AutoIt there isn't much to do when that happens. Just wait or manually kill your app. Embarrassing for you as coder, surly ...Should be. What about this. I register internal handler and when my app hangs next time, I deal with that the way I like it. Maybe try to unblock it or notice the behavior for the future or simply exit, whatever... This UDF gives you ability to register function to call when app stops respondin