Path: utzoo!attcan!uunet!jarthur!usc!ucsd!ucbvax!bloom-beacon!EXPO.LCS.MIT.EDU!rws
From: rws@EXPO.LCS.MIT.EDU (Bob Scheifler)
Newsgroups: comp.windows.x
Subject: (none)
Message-ID: <9006061810.AA26359@expire.lcs.mit.edu>
Date: 6 Jun 90 18:10:18 GMT
References: <9006061805.AA04566@mbunix.mitre.org>
Sender: root@athena.mit.edu (Wizard A. Root)
Organization: The Internet
Lines: 8


    First I do XQueryTree to get the child windows of the root 
    window; then I do XFetchName and a strcmp to obtain the appropriate child.

You are probably being confused by using a reparenting window manager;
you've gotten a window manager frame, not a real client window.  Given
a child of the root, you can call XmuClientWindow (in R4) to obtain
the "real" window you want.  See if that works.