I've used codebase pretty extensively with VisFox. We had the need because we had a clipper system that we were maintaining compatibility with. Keep in mind that CodeBase still doesn't support the new DBC format, just the Fox2x compatible structure.

As far as speed, the library itself is fast, but VisFox is faster at native functions. If you are planning on writing a FLL, try not the leave the library until all processing is done. The switching between FLL library and VisFox code is very expensive. As long as the loop runs inside the C++ FLL it will be fast.
But looping inside VisFox calling the FLL will be painfully slow.

You can also just declare the C4DLL functions inside VisFox and call them there. This is the easiest, fastest way for one-shot functions (not loops!)

HTH,
Ed

>Would anyone like to share direct experience with the CodeBase product? I have ordered the 30-day test drive, and intend to experiment with C++.
>
>Things that would be interesting to know:
>
>1. Any stories of complete and successfully deployed applications using CodeBase.
>
>2. Motivations for going outside Fox to use CodeBase.
>
>3. Pitfalls and disappointments, including any reasons why you may have abandoned CodeBase.
>
>Thanks!