|Michael, I'm assuming you mean the Show Desktop icon in the Quick Launch area of the Taskbar. Go to the link below and scroll down to line 61 (right column) and click on (you may want to right click and use Save Target As) "Restore/Add Show Desktop to Quick Launch Bar" to download a vbs file and save it to your hard drive. Double|
click the vbs file. You will be prompted when the script is done.
Here's another alternative.
Copy and paste the five lines below into Notepad.
Then save it as Show Desktop.scf and drag it to your quick launch bar.