MWI (=MouseWheelInput) is an input-interface for a wide field of devices (Mousewheel, Powermate, Car2PC,...).
[(c) Zoran Horvat, http://zhorvat.dyndns.org]
With this piece of software you are able to define the functionality of your input device.(eg. Button B reduces volume).
Configuration
MWI sits in the background. You can change the configuration via accessing the tray-icon.