<?php Prado::using('System.Web.UI.ActiveControls.*'); class Ticket507 extends TPage { public function onLoad($s) { //the following fixed the static declaration on the above $this->list1->SelectionMode="Multiple"; } function list1_callback($sender, $param) { $values = $sender->getSelectedValues(); $this->label1->setText("Selection: ".implode(', ', $values)); } function enable_list() { $this->list1->enabled = true; } } ?>