scroll button active only for window mouse is over

I would like to make the scroll button active ONLY for the window the

mouse is over. ..

I hate it when you are in Windows explorer and try to scroll down a

list of folders in the left column and the right window scrolls

through files, You have to click on a folder and it opens that folder

(which is NOT what you intended).

or

If you are filling out a form and you just entered the number of

passingers for Northwest, go to another area on the form and

accidently hit the scroll button changing the number of passingers

from 2 to 4!!!!!

How do you make the scroll button work ONLY for the window you are

mousing over? I have Windows XP and looked at the mouse settings and

see nothing. I have the Logitech trackball at home and a Microsoft

mouse at work.