What command to "hang" on HotKey to fix the active window on top?

Question

linux

The question is in the title, I'll just add the LinuxMint18 MATE system.
Thanks in advance for the correct answer.
wmctrl -r :ACTIVE: -b add,above "always on top"
wmctrl -r :ACTIVE: -b remove,above "
unflag "

Answer 1

Nearly 50 people have looked at the question
and doesn't anyone know???
I found it myself, BUT ..... (and without compiz? no way???)