Read the manual how to launch the vaio control center.You can set the function of the buttons to launch a program............
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For VGN-FS600 Series models:
Muting*1, Stand by, Hibernate, Max Brightness, External Display*2, Launch Application, VAIO Zone, SSMS
Audio Filter, Multiple Monitors
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The VAIO Control Center utility allows you to consult system information and specify preferences for system behavior.
To use VAIO Control Center
1 Click Start, point to All Programs, and click VAIO Control Center.