how do I make all the columns the same size in gtkTreeView?

[rob <mailingLists pangolin org uk>]

hi,

just a quick question
how do I make all the columns the same size in gtkTreeView?
I can't seem to find a function to do this.
(I'm using the GtkListStore as the model if this makes a difference)

Thanks

ps 

Are there any tutorials about creating your own models or about
using/createing interfaces?
 
-- 

rob