xorg get windows visible stack (active, behind the active, behind again…)

[Giuseppe Penone <giuspen@xxxxxxxxx>]

Hi, thanks to the excellent wmctrl (http://tomas.styblo.name/wmctrl/) it was easy for me to retrieve the C code needed to list the visible windows.

What I still need though is to obtain the information about what is the active window, what is behind the active window, what behind again then...

Does anybody know if and how I can obtain this information?

Thanks.
Giuseppe.

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