Finally, I bought Act-Labs' USB lightgun, and I thought at least this one would work with Gamestudio without any problems, as it works just like a mouse. Surprise, surprise, I thought wrong again. It works only in window mode, not in full screen. It just doesn't get the right coordinates, although I calibrated it. But who would ever want to play a lightgun game in window mode???
Has anyone experienced this? Is there a dll that makes it work (should be compatible to A5, cuz' I'm using this one)?