[Dudepenelec]

Hello everybody!
Im new to this Forum.
My problem ist setting up the following remote on a RPi 2 :
www.amazon.de/RENKFORCE-ZW-52007-PRESENTER-MIT-TOUCH/dp/B00P7X1FXQ
I configured all of the Buttons the way i want using the keymap Editor addon and mouse.xml.
My only Problem ist the Powerbutton. I want to use it to open the shutdown menu.
When using the keymap Editor addon the button seems not to be recognized. nothing happens.
So i connected it to my PC and found out that it puts the Computer into sleep mode.
Next thing i did is trying "irw". No output for any button. Seems logical since it is an RF remote an not IR.
Then i used evtest.
The remote registers as two devices The Powerbutton is beeing recognized as the second device, along with the mousebuttons and touchpad.
It shows:
Event Code 142 Key Sleep.
Is there a way to edit the Mouse.xml, or Keyboard.xml in a way so that the button will be recognized by the RPi2?

I used the search Feature but didnt find a solution. So i hope someone can help me.

Thanks. and sry if my english is not that good. Not a native Speaker