Setting method of Win7 Stereo desktop

Recently, I saw the following figure stereo effect desktop on my friend's computer, how does the Win7 system realize the desktop of the effect like this? So I want to ask Win7 how to set up stereo desktop?

Small compilation Solution: win7 Stereo Desktop setting method, for Win7 stereo desktop is the system comes with a new user experience function, win7 Stereo Desktop setting method is as follows:

First new on the desktop--shortcut, then open the Shortcuts box, and type: Windowssystem32rundll32.exe dwmapi #105.

Then enter the name of the shortcut, and then click Finish.

When you see a new shortcut like this on your desktop, drag it to the taskbar to quickly start. Click on the icon on the taskbar.