[Contact Form 7]Validation for invit code

Hi,

I try to add in contact form 7 a field to validate an invitation code for send a mail.

i’ve add this :

function wpcf7_add_shortcode_text() {
	wpcf7_add_shortcode(
		array( 'text', 'text*', 'email', 'email*', 'url', 'url*', 'tel', 'tel*', 'invit', 'invit*' ),
		'wpcf7_text_shortcode_handler', true );
}

I’ve try this :

add_filter('wpcf7_validate_text','custom_text_filter_func', 10, 2);
add_filter('wpcf7_validate_text*', 'custom_text_filter_func', 10, 2);

function custom_text_filter_func( $result, $tag ) {
	$type = $tag['type'];
	$name = $tag['name'];

	if ( 'invit' == $name ) { // <--- this line changed
		$the_value = $_POST[$name];

		if ( is_not_valid_against_your_validation( $the_value ) ) {
			$result['valid'] = false;
			$result['reason'][$name] = "Le code invitation est &eacute;rron&eacute;.";
		}
	}

	return $result;
}

and this :

add_filter('wpcf7_validate_text','custom_text_filter_func', 10, 2);
add_filter('wpcf7_validate_text*', 'custom_text_filter_func', 10, 2);

function custom_text_filter_func( $result, $tag ) {
	$type = $tag['type'];
	$name = $tag['name'];

	if ( 'invit' == $type ) { // <--- this line changed
		$the_value = $_POST[$name];

		if ( is_not_valid_against_your_validation( $the_value ) ) {
			$result['valid'] = false;
			$result['reason'][$name] = "Le code invitation est &eacute;rron&eacute;.";
		}
	}

	return $result;
}

And this shortcode :

[invit* INVIT-TEST-CODE]

But when i test my form, the field exist but form send an email than code field is good or not. No validation. No message concerning an error.

Can you help me ?