Popping up NSComboBox via key stroke

[Andreas Höschler]

Hi all,

while editing the text field of a NSComboBox I would like to pop up the 
combo box (in order to view the items) via a key stroke without needing 
to click on the arrow with the mouse. I assume teh OPENSTEP spec does 
not offer/include this feature. Where would I hook this in?

Ctrl-Space might be a good stroke for this but I don't know which 
keyDown: method I have to overwrite for this

Any ideas?

Thanks a lot!

Regards,

  Andreas