On a linux host, with an XP guest, the mouse moves easily between the windows guest and linux. This is great, except when I am resizing/moving a window or operating a scroll bar near the edge of the guest window, and the mouse drifts out, and my move/resize/scroll operation is disrupted. So I'd like to see the mouse pointer wconstrained inside the guest window whenever a mouse button is being held.
It's not quite as simple as that, at least it won't be if/when drag and drop support eventually gets added, so the mouse should only be constrained while resizing, not dragging.