function definition() {

$mform = $this->_form;

list($instance, $plugin, $context) = $this->_customdata;

$mform->addElement('header', 'header', get_string('pluginname', 'enrol_apply'));

$mform->addElement('text', 'name', get_string('custominstancename', 'enrol'));

$mform->setType('name', PARAM_TEXT);

$options = array(ENROL_INSTANCE_ENABLED => get_string('yes'),

ENROL_INSTANCE_DISABLED => get_string('no'));

$mform->addElement('select', 'status', get_string('status', 'enrol_apply'), $options);

//$mform->addHelpButton('status', 'status', 'enrol_apply');

$mform->setDefault('status', $plugin->get_config('status'));

if ($instance->id) {

$roles = get_default_enrol_roles($context, $instance->roleid);

} else {

$roles = get_default_enrol_roles($context, $plugin->get_config('roleid'));

}

$mform->addElement('select', 'roleid', get_string('defaultrole', 'role'), $roles);

$mform->setDefault('roleid', $plugin->get_config('roleid'));

$mform->addElement('textarea', 'customtext1', get_string('editdescription', 'enrol_apply'));

$mform->addElement('select', 'customint1', get_string('show_standard_user_profile', 'enrol_apply'), $options);

$mform->setDefault('customint1', $plugin->get_config('customint1'));

$mform->addElement('select', 'customint2', get_string('show_extra_user_profile', 'enrol_apply'), $options);

$mform->setDefault('customint2', $plugin->get_config('customint2'));

$mform->addElement('hidden', 'id');

$mform->setType('id', PARAM_INT);

$mform->addElement('hidden', 'courseid');

$mform->setType('courseid', PARAM_INT);

$this->add_action_buttons(true, ($instance->id ? null : get_string('addinstance', 'enrol')));

$this->set_data($instance);

}

}