I have a program that interprets the input from my mouse and provides multitouch gestures. I wrote it using a game engine, which always creates a window when it runs. I'd like to run this program without seeing the window, so this is the point of the questions:

Can invoke a graphical program but have the window hidden?

By hidden I mean anything that keeps me from encountering the window on my desktop. So I would accept something like, "open on a different, previously non-existant screen."