Valentin,
If you are using VFP it's much easier to use regular DLLs instead of FLLs. DLLs can be built in most any language usually C/C++. If you have Visual Studio there is a sample of creating a DLL in VC++ and using it from VFP on my website.
>Hi! People, do you know, how I can make, or can I, my own FLL file. IF yes
> how
>ENDIF