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From: rws@EXPO.LCS.MIT.EDU (Bob Scheifler)
Newsgroups: comp.windows.x
Subject: Re: simple Xlib question
Message-ID: <8901301253.AA01957@EXPIRE.LCS.MIT.EDU>
Date: 30 Jan 89 12:53:47 GMT
References: <49087@yale-celray.yale.UUCP>
Sender: daemon@bloom-beacon.MIT.EDU
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    My program is doing XSelectInput(.,.,KeyPressMask) on several windows
    of my display.  It receives KeyPress events for any kind of window
    except xterm windows

I suspect you'll get similar behaviour for most Xt clients that accept
keyboard input.  The "problem" is that xterm (and other clients) have
subwindows that have KeyPress selected for (but typically not KeyRelease),
and they get "first dibs" at the event.  Go back to the Xlib or Protocol
doc and read about the window hierarchy and device event propagation.