Hi, I'm trying to write an application that in some state needs to lock the phone. The application runs fullscreen and the user should only be able to reactivate the phone by a predefined PIN. If the user presses the power button he can easily kill my application with "end current task" or he uses "Ctrl-Backspace" to activate the Taskmanager and kill the task then :/ Is there a way with python to disable both possibilities temporarily?