downgrade a 5-button- to a 3-button-mouse

[Hermann-Josef Beckers]

We are running a propietary application on a tablet pc  (windows XP 
Tablet-PC-Edition).. Most
everything works, but there is a small glitch: For handling reasons some 
(function-)keys
are combined into a small panel. Clicking the keys with the pen has no 
effect. Entering these
keys with the virtual keyboard or a real attached keyboard works.

>From the support-line:
"This application DGK5 supports the configuration of a 3-button-mouse 
only. In Cygwin is a
5-button-mouse configured. You have to configure the Cygwin-X-server in 
such a way,
that a 3-button-mouse is recognized."

HOW? 
A Xfree-conf-file isn't used in Cygwin (AFAIK). "-emulate3buttons" has no 
effect, as it works 
the other way up (3 buttons on a 2-button-mouse). 

Any hints?

Yours 
hjb