Any way to get the game to keep mouse control?
 

I've got a multi-monitor setup, and this game (even fullscreen) just...doesn't play well with that. When I'm trying to move the view around, the mouse keeps going off the side of the window and onto my secondary monitor.

And this is frustrating when I'm trying to shoot, as I don't really notice that and click the mouse...something gets selected on another window or run or worse, since the game doesn't have focus.

Is there any way to get the game to KEEP focus?