Using Comm... err, alternative?

[Pavel Romashkin <promashkin(at)cmdl.noaa.gov>]

I have a short question. When you have several (identical, object
plotting only) widget windows, how do you find out which one is the
topmost without using a common block or defining a main-level variable?
I use focus events all right, but I have not figure out where to keep
the resulting information.
I certainly will use a pointer if all those daughter windows are
generated from a parent widget program. But how do I do this if I create
them from a command line?
Thank you,
Pavel