>but structures (and pointers) are different things as VFP doesn't have them

It's true that VFP doesn't have pointers. Fortunately, for Win32API, you just need to send pointers as parameters for functions, not to make any other operations with them.

The rule is simple:
If the parameter is a pointer, you send it by address: @MyVar. If it's not a pointer, you send it by value: MyVar.

HTH,
Vlad