itemfactory question

["Poletti, Don" <don poletti comverse-in com>]

I am using the itemfactory to make menus and I am having to problems.

1) What is the prototype for the callback. The header file has three
different
ones and none seem to work. If its not obvious I'm refering to the third
entry
in itemFactoryEntry which is the what gets called when selected

2) The itemfactoryEntry does not seem to have any way to provide gpointer
data. 
Is there a way?