program state: minimised or not

[Azrael <azrael azrael-uk f2s com>]

Is there a way to get the state of a window/program?
To determine if the program is minimised or not.
To determine if the program currently has focus or not?

And a way to run commands upon the program window obtaining focus?

many thanks
-- 
                Azrael

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ICQ#52944566