[N9]How to Turn off the screen?follow the article but not success,helpme

[pcode]

i have readed the article

http://www.developer.nokia.com/Commu...ML_and_C%2B%2B

follow the steps do the same on Nokia crator
i can create a deb file .i can install on my N9
but nothing happen when i click then icon.

can anybody test the code give me some help?

[gnuton]

Hi,
I've built and run the app in the zip file on my N9 and it worked nicely.