private function build_form()
{
$form = new HTMLForm(__CLASS__);
$fieldset = new FormFieldsetHTML('config', $this->lang['config.title']);
$form->add_fieldset($fieldset);
$fieldset->add_field(new QuestionCaptchaFormFieldQuestions('questions', $this->lang['form.questions'], $this->config->get_questions(), array('description' => $this->lang['form.questions.explain'])));
$this->submit_button = new FormButtonDefaultSubmit();
$form->add_button($this->submit_button);
$form->add_button(new FormButtonReset());
$this->form = $form;
}
