Is there a way to keep the mouse pointer in my window

Question

I would like to change the cursor so that it can not go outside my application window until they exit the program. Is this possible?

Answer 1

Just because you disagree with its usage does not make
it an invalid question. Suppose you had an
application dedicated to real-time monitoring of a
high-pressure system. In our hypothetical example,
accessing other parts of the system without first
properly "dismissing" the application could be
potentially hazardous - people could get hurt. In
this case, would it not make sense to make the
application "system-modal"? Furthermore, it would be
a convenience to the operator if the mouse pointer
were trapped in this critical application.
How would one go about trapping the mouse cursor
inside this application?Yes, it would make sense to make this application system-modal. And it would also make sense to not allow any other applications to run on the monitoring system. For such an application, then, it would occupy the entire screen and there would be no way to swap away from it to any other application. Which is what several people suggested for this rather non-critical application, I believe.
But in the ordinary case, where you are running on a system that does allow multiple applications to run, trapping the mouse cursor in a single application is bad manners and an alternate solution should be sought.