Mapping Menu button

Hi,

I just bought a standard pc remote to use with my XBMC. The remote is working just fine straight out of the box, except the fact that it is missing buttons like info, context menu etc,
I googled a little bit and i found the KeyMapEdit which did great job for me, but there is one small problem. It seems that i can't find which action is bringing the menu while playing a video (like on the iOs remote) so i was wondering whether someone knows which is the action.