Purpose: discuss what function  a window manager has and what
Tk can and cannot do with the help of a window manager, etc.



Interesting related reading: an emerging window manager specification
[http://www.freedesktop.org/standards/wm-spec.html].









[ICCCM]








[[pertinence of xprop]]





[[examples]]


[[Summary:  it's hard for Tk to know what the WM is doing.]]