package {
    import flash.display.Sprite;
    import flash.net.Socket;

    public class SecurityErrorExample extends Sprite {

        public function SecurityErrorExample() {
            try {
                var host:String = "www.[yourDomain].com";
                var socket:Socket = new Socket();
                socket.connect(host, 65536);
            }
            catch(e:SecurityError) {
                trace(e);
            }
        }
    }
}