Win7 desktop wallpaper how to automatically change

Windows7 desktop blank space click the right mouse button, click on the personalized, desktop background, you can set the Windows7 wallpaper switching interval, as shown below:

Obviously, here There are only time intervals, and only the set 10 seconds, 1 minute, etc. make people choose. The animation switching effect is not so Morph.
Modify the registry to see what changes?
Save the following 7 lines with notepad as cool.reg
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USERControl PanelPersonalizationDesktop Slideshow]
" Interval"=dword:0000ea60
"Shuffle"=dword:00000000
"LastTickLow"=dword:00000000
"LastTickHigh"=dword:00000000
"AnimationDuration"=dword:00002328
Double-click this saved cool.reg and import it into the registry —

Do not restart, if you use a theme package containing multiple wallpapers, just look at the wallpaper switching effect.
Explain, in the above 7 lines, AnimationDuration is the key value of the animation effect control, 2328 is 9000 (milliseconds) in hexadecimal, which is 9 seconds, you can set the short point, the effect of morph will be faster . The key value of Interval is 0000ea60, which is the interval time, which is set to 10 seconds. As shown below

Revert to the system default:
Open the registry editor, delete the key value of AnimationDuration under HKEY_CURRENT_USERControl PanelPersonalizationDesktop Slideshow.