How to catch the Fn+? keys on laptop?

Question

Can I catch the Fn+F3( or Fn+F2....) keys with my program?

Answer 1

I can't understand why AppleWirelessKeyboard.exe could catch the fn key, i find "ModifierFn" in the code:

http://applewirelesskbrd.codeplex.com/SourceControl/changeset/view/8644#2458