There is a Trick in Windows Vista.
Here when we press Windows Key Win Menu Appears.
Similarly when we press win key with any number the Corrosponding Application in the QuickLaunch is executed.
For instance if you press
Win+1 then Show Desktop Application Executes
Win+2 Executes Switch between Windows
win+3,Win+4 and so on…
This way the user have a easy Navigation of the Application .