Hello mallen,
Right click on the desktop, and create a
new shortcut.
The location of this shortcut will be
rundll32.exe DwmApi #105
Name the shortcut what ever you like.
With your new shortcut on the desktop, right click it and select
Properties
In the Properties window, make sure that the
shortcut tab is selected, then click on
Change Icon...
in the change Icon box type in
explorer.exe, pick the Flip3D icon > OK > Apply.
Right click your new shortcut again and select
Pin To Taskbar
Delete the shortcut on the desktop and click that button on the taskbar!
Or you can download it
here (Note - you'll need to unblock it in the properties box)
Hope this helps
EDIT: Are you trying to do this in Windows XP or Windows 7?