Hi Varun Kumar,
there is no need to add the code (the System Event Handler) in every screen to remove the current screen and to add the Home screen.
Instead, you can place the System Event Handler within your Application object in order to remove the current screen and to navigate to the Home screen. Then you have still the separation between the GUI and the device class. And there is no need for duplication of code.
Best regards,
Manfered.