This is primarily an interface between the windows DLL functions for the mouse and AutoIt, so don't shoot me for unoriginality...
> _MouseSetTrap behaves differently than the _MouseTrap Function built into Misc.au3. Given blank strings in parameters, it will set those values to the extreme edges of the screen, not to its opposing value +1. You also need to call _MouseReleaseTrap to release the trap, these really should have been separate in the Misc UDF as they are different actions requiring different calls.
> In reguards to _MouseSetPos, yes this can be done with the MouseMove function, but I figured it couldn't hurt to throw it in.
> _MouseGetPos is more useful than MouseGetPos in some cases because it returns an array with both, not just x or y. (EX: Storing mouse position for replay later)
Hopefully this will prove useful.