Carl,
On my website is some sample code for using structs in VFP. It's under Q&A, General, Article qGEN003. As long as there are no pointers inside they are pretty easy. There is a class in the libraries here that will work with pointers.
>I'm trying to call a function in a DLL provided by a third party using VFP5. The sample code provided includes implementations for C++, VB and Delphi but none for VFP. The sample code for some of the function calls reference structures (instead of Short, Long, String) as the parameter type. Knowing nothing about structures, I'm stuck.