[maemo-developers] Getting access to fremantle zoom/volume buttons?

[From: Till Harbaum / Lists]

Hi,

the fremantle development units in copenhagen had some kind of zoom 
buttons which didn't work the diablo/chinook way and which permanently 
seemed to be assigned to sound volume adjustment.

How can an application get access to these? Osm2go does not have any
audio output but really has a use for zoom buttons. How do i use them?

Till