Popping a combo->list up?

[Eduard Roccatello]

Hi there,
i'm trying to improve my autocompletion patch a lil and i like to make the 
combo list popping up if there is no text in the entry and you press TAB.
(thanks for the notice :-)

My problem is that i'm not able to do this without accessing to private 
field of the combo struct (ok, it's c and i could do this but i think it 
isn't the best way).
Has someone already done this?

Thank you :o)

-- 
Eduard <Master^Shadow> Roccatello