[SOLVED] How to lock my mouse to a specific area or game window

[cratag]

Hey there. I need some software to lock my mouse within a specific area.
Im playing Diablo II windowed and the cursor escapes the window constantly, minimizing the game and (often) dying.

http://www.rtsoftwares.com/MouseLock/MouseLock.htm This app did the trick to me, but I don't have the 10 dollars to buy it right now. Any other tricks you guys might know about? Thanks

 

[Ralston18]

Just out of curiousity: why are you playing windowed vs full screen?

What do you gain?

 

[Alabalcho]

A brute-force solution: Install Diablo inside a virtual machine, and disable mouse integration for that VM. Your mouse, keyboard etc will stay inside.