Secure PDF or Print PDF to new PDF using Excel VBA

I have a form with fields that have been filled using Excel VBA.  I want to lock the form down using Excel VBA code (more than just setting the form fields to read only).  I have found two manual solutions:  1) Set Document Properties to Password Security and restrict editing assign a password and not allow any changes.  2) Print my completed form selecting Adobe PDF as my Printer.

I have not been able to find a way to code either of these options.  I would greatly appreciate help with either approach and/or some third option that achieves the same goal of a completely locked PDF generated using Excel VBA.  Thank you!