How to detect which version (32 or 64 bit) of Excel/Office installed

How to detect which version (32 or 64 bit) of Excel/Office installed

Does anybody know of a reliable method for programatically detecting which version 32 or 64 bit of Office, in particular Excel, is installed on a users machine Ive looked at similar questions and answers on StackOverflow but the answers are generally from several years ago and the techniques no longer work. Ideally I would like to be able to just query the registry but I suspect its not as simple as that. Thanks in advance.

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