Tordex Wheel adds intelligence to the mouse wheel. By default, when you roll the mouse wheel, Windows roll the currently active window and ignore the mouse cursor position. With Tordex Wheel, Windows rolls the window under the mouse cursor, so you can scroll windows, lists, etc. without having to activate them.
Using Tordex Wheel is very simple. Just run it and Tordex Wheel will improve your mouse wheel. The program sits in the Windows Tray and doesn't take much resoures.