How to detect if foreground application is running in full screen mode

Is it possible to detect if the foreground application is running in full screen mode or not?

To get it more specific, I want to know if the "Status pane" is visible or not when another application in foreground?

Many thanks in advance.

Never seen an API which would tell that one, anyway, whywould you need to know that ?

I wanna keep my indicator visible for the user as long as the status pane is visible, and to hide it once the status pane gets hidden / covered by another application [ videos - games - etc ] . Do you have any suggestions / alternatives?

I would consider doing it as most apps do, i.e. simlply show the indicator when home screen/ menu is shown, and hide it in other cases.