Creating constant valued scalar variables is obviously possible with
SetEnv, but is there an accepted way to do anything beyond this?
I have two questions about this:

I  Lets say, for example, that I wanted to create a command that keeps
track of the location of every window on the screen and restores them to
that condition if I press that command again, while ignoring windows
that are new or closed.  Is this possible in fvwm?

These are the big problems I can't solve:
1)  I can't find a non-scalar assignment mechanism.
2)  I can't find a looping mechanism that uses such an assignment
(foreach type looping)
3)  I can't find a way to return the properties of a window. 
4)  Some Window commands don't accept a Window name or id, and will only
use the "current" window. 

II  Is there a way to get the properties from a window newly created
with an "Exec" command (or from multiple windows created from an Exec
command)?

I've looked through all the modules, read the FAQ, and looked at quite a
few fvwm2rc files, but I can't find the answer to these questions. 
Anyone have a clue?  Any help would be greatly appreciated.

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