A few years ago I had to do some interfacing between python and some modelling software. I went through a COM interface, and it was a bloody nightmare to find docs.
I later found out I could have looked for "ActiveX" and found similar results.
A few years ago your best friend would have been https://www.codeproject.com . The issue of searching difficult questions using another keyword (e.g. ActiveX) is that you can miss the only answer available. For common questions (with answers!) you can find an answer with all the variations.