I finaly understood the crazy behavior of my pointing device
Its tuned for 640x240 even if I have 800x600 display so what happen is
that there is some king of devider for x and y real values that when I
press on lower right screen its points only on 640,240 instead of 800,600

how can I fix this problem?

thanks

-- 
Shlomo Steinberg
MOTOROLA SPS
DIGITAL COMMUNICATION INFRASTRUCTURE
Chip Design Engineer
E-MAIL : shlomo.steinberg@motorola.com
Tel: 972-9-9522653
Mobile:051-270792