Multiple Monitor Support.
The senario is that you have dual monitors [ 1 ][ 2 ]. You have a window on 1 you move this window to the left [ |X][ | ]. You move it left again and it goes to 2 [ | ] [X| ]. And again and again [ | ] [ |X] & [X| ] [ | ]. So you can go in a loop in both directions left and right. This is what win 7 has.

Good work with restoring the project, love the icon.