GtkComboBox::set_active_iter
void set_active_iter(GtkTreeIter iter);
iter: A valid GtkTreeIter pointing at an item in the associated GtkTreeModel.
The set_active_iter() method sets the current active item to be the one referenced by iter in the associated GtkTreeModel. iter must correspond to a path of depth one. The "active" property is also set by this method.
See also: get_active_iter()