I wonder why VirtualBox and VMWare's Player both "capture" and bound the mouse pointer to the Virtual Machine and not let it come out, and needing to press RIGHT CTRL key or CTRL-ALT to come out.
Microsoft's Virtual PC 2007 actually just treat the VM as an app and let the mouse move freely in and out... and for the few months I have used it, I don't see any problem. So I wonder why VirtualBox and VMWare's Player do it that way and can it be configured that they don't?