So, sometimes I am asked by a client to unlock an Excel VBA project because a prior developer has left the project locked and left the client's employment.
Clearly, there is a legal duty to establish that they do own the code, if not then I believe this is a criminal offence under some jurisdictions (certainly UK) and one should refuse.
Once legal issues are resolved then there is the technology. One once used to be able to use a Hex editor and edit some bytes in an Excel file to crack open the VBA. This SO post is remarkably ingenuous in that hacks the password dialog box, quite extraordinary.
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