Accessing GtkComboBoxEntry's toggle button

["Ian King [ES]" <king eiffel com>]

Hi,

Is it possible to access the Toggle Button of a GtkComboBoxEntry from 
outside?  I need to hook up an event so that I can populate the 
GtkComboBox just as the user has requested for the items, hooking up to 
the toggle button seems to be the best way to do it, I can then 
intercept what the button is doing, populate the model and then pop down 
the menu myself.

Is there a standard API to access private features should you want to 
change the default behavior?

Thanks in advance

Ian King