How to use third-party plug-in for MS Office in your program?

There is a third party program that installs add-ins in MS Office. To this program there is no official API. It would be interesting to call this plugin from my program as a kind of API. Is it possible to do?
Also interested to know how to develop plugins for MS Office (read?).
September 26th 19 at 06:40
1 answer
September 26th 19 at 06:42

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