Office Add-In Support for Word 2013

Tim Gerhard 1 Reputation point

I've recently started developing an office add-in for Word. My add-In basically inserts html code into word and works as expected on Office 365.

Our customer still uses Office 2013 though, and unfortunately the add-in doesn't seem to work in his application. The Add-In can be displayed but the html-insert code doesn't work (nothing seems to happen onClick).
Some further research indicated that even the lowest version of the API is unsupported by Word 2013 (Docs:

That being said, is there an option to make the add-in work for Word 2013 and if not, where can I find further ressources / documentation for add-in development for legacy versions (COM / VSTO)?

Office Development
Office Development
Office: A suite of Microsoft productivity software that supports common business tasks, including word processing, email, presentations, and data management and analysis.Development: The process of researching, productizing, and refining new or existing technologies.
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