How to make service that runs under SYSTEM but can interact with User?

[E1M1]

Vista and newer windows don't really allow service to interact with user anymore. Iven if you specify type=interact then it just means that when service creates gui user receives notification which allows him/her to switch to session 0 as all services run in session 0.

So if you if you run this code as system service all you see is following image:

#include
$l = WinList()
_ArrayDisplay($l)

My service needs to be able list User's windows, not only SYSTEM's windows. I found some solution at http://stackoverflow.com/questions/267838/how-can-a-windows-service-execute-a-gui-application

But I don't know how to properly use CreateProcessAsUser() in my services (would be perfect If I could see example). I would like to know if there are any alternatives to CreateProcessAsUser.

[E1M1]

I figured that ultra vnc works when it's system and it's not even interact type