These are designed mostly for graphic artists. They have two modes where you can use it like a pen or a mouse. "Pen mode" makes the tablet space correspond with the screen space. "Mouse mode" does not so you can adjust the sensitivity. The $220 - $400 ones are extremely precise, measure how hard you press the pen into the tablet, and measure the tilt you have the pen at.
I'm dying to use one of these controllers for first person shooter games. In particular the yet-to-be-released game Quake 4. The precision and "pen mode" are what entice me so much. I do have a little bit of experience using one in Quake 2 so I'm not completely new to this. I liked how exact places on the tablet corresponded to exact angles I could aim at. That way there was no loss in tracking like even the best optical mice of today have.
If AHK won't work with this type of controller or AHK won't work with Quake 4 (Doom 3 engine), I'll have to abandon the idea.
Does anyone have any experience with the inner workings of a pen and tablet or sending keystrokes with AHK into Doom 3?
note: I did read this thread Astaelan started about hooking into direct input
http://www.autohotkey.com/forum/viewtopic.php?t=829&start=0&postdays=0&postorder=asc&highlight=doom .