Win. Vista, Change order for shutdown window

Dear All,
Am running windows vista enter. 32 bit on my machine.
When i use the turn-off short key (Alt F4), the shutdown window appears and the first option in the drop down list is " Sleep ".

I want to change the order of these commands, like: i want the first option to be LogOff.

Any Help.

Best regards,

 

http://www.msfn.org/board/index.php?showtopic=89361