I found a method for applying protection to PDFs using and the list of instantiateable COM classes found. I use 'CreateObject' to perform late binding of the Acrobat objects, but if you have Acrobat installed, you can add a reference in your project by going into the VBA IDE and clicking Tools - References. And checking the box next to 'Adobe Acrobat x.x Type Library' (where x.x is your version of Acrobat). If you don't see that available, look for 'acrobat.tlb' in Program Files and add it via the Browse.
Password protect a PDF file PDF (portable document format) is a convenient file format to. Open the PDF document that you want to protect in Adobe Acrobat. Process of removing password of a protected PDF totally depends on the password protection applied on a PDF file. Generally, there are two types of passwords.