include shortcode in Additional Settings field

hi!

i want to include a parametric shortcode in additional setting field.
i want to redirect in a specific page using the on_sent_ok code.

1. so i create a new short code with my link ( a pp link )

add_shortcode( ‘link_pp’, ‘gpx_cf7_pp_counter’, true );
function gpx_cf7_pp_counter( $atts )
{
// estraggo i parametri necessari da aggiornare!
extract( shortcode_atts( array(
‘id’ => ‘…’,
‘item_name’ => ‘…&’,
‘item_number’ => ‘2’,
‘amount’ => ‘0%2e00’,
‘return_link’ => ‘…’,
‘cancel_return_link’ => ‘…’,
‘notify_url’ => ‘…’)
, $atts ) );
$output = ‘https://www.paypal.com/cgi-bin/webscr?cmd=_xclick&busin…’;
return $output;
}

2. and then i call a do_shortcode on additional setting field in this way:

add_action(“wpcf7_before_send_mail”, “wpcf7_do_something”);
function wpcf7_do_something (&$WPCF7_ContactForm) {
$WPCF7_ContactForm->additional_settings = do_shortcode( $WPCF7_ContactForm->additional_settings );
}

But this didn’t work! I forgot something?
There is a way to include custom shortcode in Additional Settings Field?

Thanks

https://www.ads-software.com/plugins/contact-form-7/