Using win-keys in GTK

[Fabio Rotondo <fsoft galactica it>]

Hi!,

  a simple question: I'd like to listen for the user to press for 
"special" keys: the winkeys and menu keys
present in many keyboards today. I have managed to get the signal, but 
if I click a gtkbutton while
holding a winkey, the gtkbutton click event is not emitted. Any hint?

Ciao,

  Fabio