Hello!

GNU Emacs 22.1.1 (i486-pc-linux-gnu, GTK+ Version 2.8.20)
of 2008-06-23

When I hit the Menu key on my keyboard, I get the M-x in the
minibuffer.

How can I set up Emacs so so I get not M-x with menu key?

I want actually to add some other function to the Menu key.

I try to find this setup with

M-x customize-group
keyboard

but there I can't find any customization option for this.

Any advices will be appreciated!