screen -X with -x

[Robert Blackwell]

How do I control the users session  with -X?

Example:
        If I have 3 terminals, term1,term2, and term3.

        term1> screen -S testing
        term2> screen -xr testing

        At this point I have two terminals connected to the same screen 
session, testing.

        If I do something like

        term3> screen -r testing -X windowlist

        I will get a windowlist in term2 (the one most recently created).  How 
do a control where the -X command will go?
        If I wanted the windowlist to show in term1 for example.


Thank You
Robert