Hi, Joel.

>Do you know of any good documentaion on how to devfelop and how to use DLL?
>
>The docs in VFP8 help are fair, but I would like a little more details as to how client will pass parameters and how I can pass back a small cursor

You can take a look at this article from Marco Mazzarino:
http://www.utmag.com/April2002/Page18.asp

Also, Pablo van Diest is currently writing a column about VFP and C# for the magazine. One of the upcoming articles is especifically about doing what you want. 8-)

Hope this helps,