Pregunta de novato

[mnrguez]

El error en concreto es el siguiente:
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in C:\AppServ\www\pruebas\unit4.php on line 11

y el codigo fuente es este:

<?php
//Includes
require_once("vcl/vcl.inc.php");
use_unit("forms.inc.php");
use_unit("extctrls.inc.php");
use_unit("stdctrls.inc.php");

//Class definition
class Unit4 extends Page
{
public $ListBox1 = null;
public $Button1 = null;
public $Edit1 = null;
function Button1Click($sender, $params)
{
$this->ListBox1->Items[] = $this->Edit1->Text;


}

}

global $application;

global $Unit4;

//Creates the form
$Unit4=new Unit4($application);

//Read from resource file
$Unit4->loadResource(__FILE__);

//Shows the form
$Unit4->show();

?>

Gracias