sensitive state in ComboBox menus

[Carlos Pereira <jose carlos pereira ist utl pt>]

Hi!

How can I set a row in a combobox menu as insensitive/sensitive
and know the current sensitive state, for:

1) a combo box created with gtk_combo_box_new_text

2) a more general combo box created with a tree model

In option menus, I used:
gtk_widget_set_sensitive (item, FALSE);

but this does not work here, as rows are not widgets anymore...
Many thanks for your help!

Carlos|| 
<http://library.gnome.org/devel/gtk/stable/GtkComboBox.html#gtk-combo-box-new-text>
|| 
<http://library.gnome.org/devel/gtk/stable/GtkComboBox.html#gtk-combo-box-new-text>