Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!mcsun!ukc!harrier.ukc.ac.uk!rlh2
From: rlh2@ukc.ac.uk (R.L.Hesketh)
Newsgroups: comp.windows.x
Subject: Re: EventMask for XSendEvent
Message-ID: <4614@harrier.ukc.ac.uk>
Date: 9 May 90 17:02:05 GMT
References: <26900116@m.cs.uiuc.edu>
Reply-To: rlh2@ukc.ac.uk (Richard Hesketh)
Organization: Computing Lab, University of Kent at Canterbury, UK.
Lines: 32

In article <26900116@m.cs.uiuc.edu> carroll@m.cs.uiuc.edu writes:
>I'm having problems with Client Messages and XSendEvent. The code works on a
>SysV 11R3 system, but not on Sun-3's or Sparcs with SunOS4.0.3 & 11R4.

Ahh, that little nut.  I think this one is getting popular enough to
become a "common asked question about X11".

>In desperation, I tried the following:
>	XSendEvent(xr->dpy,xr->id,False,
>		SubstructureNotifyMask | SubstructureRedirectMask,
>		,&ev); 

Try ..

	XSendEvent(xr->dpy, xr->id, False, 0L, &ev);

(ie. a null event mask)

Xlib manual (section 8.10):

"If the event_mask is the empty set, the event is sent to the client
 that created the destination window.  If that client no longer exists,
 no event is sent."

>What I want to know is why I can't send it with _all_ the event
>mask bits set?

The ClientMessage event is non-maskable and does not have an event mask.

>               Was something changed here from R3 to R4? Thanks!

Yup, the MIT Server is stricter about obeying the protocol.