Working Visualize API (C#) macro or add-in

Hi,

Does anyone has a working macro or add-in for Visualize? I've tried the example add-in (https://kb.dsxclient.3ds.com/mashup-ui/page/resultqa?from=search%3fq%3dQA00000339144&id=QA00000339144e&q=QA00000339144), but that doesn't work. No build errors, but no effect after registering the add-in.
The API documentation is very limited and is of no real help.
I'd love to see a working example, anyone around who's willing to share their working code?

Thanks in advance,
Tim