Creating an Excel Add-In in D

I’m a bit confused by the suite of API’s around Office ATM.

So my understanding is there’s a COM APIfor automating Office applications that seems to launch a headless version of the application, some sort of newer JavaScript API for interacting with Office365 applications, and if I recall correctly, some sort of COM API for actually extending the application which I assume is what the D-wrapper in this article is using.

> I believe the first time I landed on the website it was not published under an open source licence, which at the time was a deal breaker for me

For the record, this was never really true. The backend of dmd (the "main" D compiler) was unfortunately not under the same licence as the rest of the compiler, but the code has always been available. The GNU and LLVM backends are both fully open source and are faster anyway.