mouse wheel support question

Thomas Chadwick
Mon Mar 1 15:31:00 GMT 2004

Here's something easy to try.  Bring up the X server, then run "xev" and 
move the scroll-wheel.  Do you see any Button 4 or Button 5 messages?  If 
so, then the server supports them.  If not, it doesn't.

>From: Daren Lim <>
>Subject: mouse wheel support question
>Date: Fri, 20 Feb 2004 13:44:50 -0500
>I've implemented a feature for an application that uses the mouse wheel on
>the Windows.
>I need to code it for XWindows. From what I have read so far the wheel 
>mouse button
>presses of 4 and 5 in Xwindows.
>I'm not sure if trying to test through Cygwin is
>not letting me detect the messages in XWindows or if there is another
>reason.  I found that for XFree86 4.2 "The mouse driver now has support
>for mouse wheel emulation."
>I tried xdyinfo | grep release
>to figure out which version of XFree86 I'm running...
>it returned "vender release number : 40200000
>So do I need to update my Xfree86 version ?

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