gint gtk_combo_box_get_active ( GtkComboBox* combo_box )
Returns the index of the currently active item, or -1 if there’s no
active item. If the model is a non-flat treemodel, and the active item
is not an immediate child of the root of the tree, this function returns
gtk_tree_path_get_indices (path), where
path is the
GtkTreePath of the active item.
Available since: 2.4