function order_finished($order_id = null, $pmethod = null, $paid = null) {
 //an order was finished, now we can do something with it
 if ($order = wpco_get_order($order_id)) {
 //we now have all the data of the order to work with
 //print_r($order);
    global $wpcoDb, $Item, $Order;
    $wpcoDb -> model = $Item -> model;
    $items = $wpcoDb -> find_all(array('order_id' => $order -> id));
    //print_r($items);
 }
}

add_action('wpco_order_finished', 'order_finished', 10, 3);