Ok button key binding

["Till Harbaum / Lists" <lists harbaum org>]

Hi,

i just noticed, that there seems to be some automatic key binding for
the Escape key to the cancel/No/Close buttons of gtkdialogs. But there
doesn't seem to be a binding for Open/Yes/Ok which i expected to be
the Return key. 

Are these bindings documented somewhere? I can't find anything. 
Also how do i make the Ok button to react on the return key.

Thanks,
  Till