Support for the following mouse features was added in the Solaris Express 4/04 release and in the Solaris 9 9/04 release:
Wheel mouse scrolling is available on a USB mouse device
This support means that rolling the wheel on a USB or a PS/2 mouse results in a “scroll” in the application or window under mouse focus.
StarOffice and Mozilla applications support wheel mouse scrolling. However, other applications might not support wheel mouse scrolling.
Support for more than 3 buttons on USB or PS/2 mouse devices