Objectdock Or Yz'dock

[shell]
command=2
IconFile=explorer.exe,3
[Taskbar]
Command=ToggleDesktop

Copy to Notepad and save as (selected all files) Show Desktop.scf

Drag the Show Desktop.scf to the Dock in order to create a shortcut.Then change the icon/image to the Desktop.png file.

Enjoy It!