How to break password from PDF using acrobat library?

I am using "Acrobat.CAcroPDDoc" object and on open method call it is returning false for a password protected file. How can I check the pdf file is password protected by passing the pathname as an argunment? and once identified as a password protected PDF, How can I remove the password using the Acrobat Class?

If it fails to open, then it’s probably password protected.
There are no APIs to remove the password, assuming you have it.
Removing it w/o the actual password would be illegal.

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