quote:
Originally posted by http://en.wikipedia.org/wiki/Fn_key
Unlike other modifier keys such as Shift or AltGr, the control processor inside the keyboard typically sends out a different keycode depending on whether the Fn key is depressed. This allows the keyboard to emulate a full sized keyboard and means that specialised keymaps do not need to be created; the operating system can use standard keymaps designed for a full sized keyboard.
That means that you will actually have to find which keystroke is sent when the Fn key is pushed...
I have a laptop, so I might be able to help you...
I will research for it some more there, but right now I can't since the laptop is not here...
Also, check
this for more information regarding the Fn key
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