On Sun, 14 Mar 2004 12:49:45 +0100, markus wrote:

> Hi all,
> I am almost a newbie when it comes to X windows or X servers so be
> patient...

I don't know anything about Cygwin/X, ... anyway ...

[...]
> that the AltGr key is not doing its thang. For example, pressing AltGr+8
> only produced "8" whereas it should produce "[". This is obviously a big
> issue in Matlab so I am asking for help here. If this is a wrong group
> for that I apologize and ask you to direct me to another group.

Maybe you need to set up a xmodmaprc-file and instruct Cygwin/X to
read it in.
The entry in that file would be in your special case:
keycode 17 = 8 parenleft bracketleft

Hope that helps.

Greetings, Darius.