gtk_clist_get/set_row_data for GtkTreeView

[Thomas Canty <tommydal optushome com au>]

Hi,

I was wondering if there were any eqvilant functionality to
gtk_clist_get_row_data and gtk_clist_set_row_data in GtkTreeView for Gtk
2.0, 

(I have already checked out the source code for GtkTreeView and can't
find anything)

If there isn't is there any other easy way to do the same thing?,

As well is there any way to compare two GtkTreeIter's?

thanks,

Thomas Canty