Keycodes captured with xev in Linux from the MS Natural Keyboard Pro

234 Back
233 Forward
232 Stop
231 Refresh
229 Search
230 Favorites
178 Web/Home
236 Mail
160 Mute
174 -
176 +
162 Play/Pause
164 Stop
144 Prev Track
153 Next Track
237 Media

235 My Computer
161 Calculator
223 Sleep