Untitled

$form = new Forms\AddApplicationForm($this, 'addApplicationForm', $this->context->droidcoders->applicationsFacade);

                if($this->isAjax()) {

                        $form['application_category']->addOnSubmitCallback(array($this, "invalidateControl"), "addApplicationFormSnippet");

                }

        $form->onSuccess[] = callback($this, 'processAddApplicationForm');

        return $form;