<?php
//Loading a part of the glade file only

//We want "btnClose" to be the root of the widget tree to load
$glade = new GladeXML('helloglade.glade', 'btnClose');

//That will work
$btn = $glade->get_widget('btnClose');

//This will fail, as the window isn't loaded:
$window = $glade->get_widget('wndClose');
//Output is NULL
var_dump($window);
?>