wordpress - Autofill textfield in WPCF7(contact form 7 plugin) using dynamic value -

i have wpcf7 form on wordpress site , want auto-fill text field using dynamic value in url. can point me how achieve ?

i faced same problem , how solved it

1) install http://wordpress.org/extend/plugins/contact-form-7-modules/

2) create hidden form item id (foobar ie).

3) in function.php file

add_filter('wpcf7_hidden_field_value_foobar', 'wpcf7_hidden_field_add_query_foobar'); function wpcf7_hidden_field_add_query_foobar($value = '') {     if(isset($_get['yourgetparamhere'])) {         return $_get['yourgetparamhere'];     }     return $value; }