Hello,
Launching the shortcut that exists here should do the trick:
"C:\Users\%USER%\AppData\Roaming\Microsoft\Internet Explorer\Quick
Launch\Window Switcher.lnk"
Where you put your user account name where %USER% is. You can copy this path
to the clipboard by holding down shift and right-clicking the icon for
"Switch between windows" next to the start button, and then clicking Copy As
Path.
--
- JB
Microsoft MVP - Windows Shell/User
Windows Vista Support Faq
http://www.jimmah.com/vista/