Capture html_form_id

I have set a custom html_form_id, and looking to pass this value into a hidden field. Is this something you can achieve with this plugin, or should I search elsewhere?

Hidden form field: [dynamichidden html_form_id “CF7_POST key=’id'”]
CF7 Shortcode placed on the page: [contact-form-7 id=”20512″ title=”Meet & Greet – Discovery Call” html_form_id=”meet_greet”]

The source code on the page translates html_form_id to just id=”meet_greet”