How do I create a shortcut for Locking my PC in Windows Vista?

1. Right Click on the Desktop.
2. Select New and then Shortcut from the Menu.
3. In the box provided enter the following Code:
“rundll32.exe user32.dll, LockWorkStation”
4. Click on Next and give the Shortcut an appropriate name.
Now when you double click on the icon your screen will lock.