Well just a raytracer in Visual basic 6, thus the name VB6 raytracer. Not because it is easy or logical, but because it is hard. I know this is not the right language to write a raytracer, see it as a stubborn POC that it is still somehow possible.
This project is horribly outdated, and will never be updated again. I'd recommend against using.
The DGM 3D Engine is a Visual Basic Project. The engine can be loaded up as reference file (DLL) in most Visual Studio languages, allthough Visual Basic is adviced.