>We have a lot of VFP databases which we need to access from .NET which were encrypted using XiTech's C40FOX80.FLL
>
>AFAIR .fll files are basically win .dll files written in C++ (in fact I think I wrote a couple myself)
>
>So the question is : Is it possible to use the Xitech library directly from .NET (and, if so, how)

Fll has to map parameters and return values from vfp memory struct to C, and for that you had to create a data structure describing methods callable from vfp with signatures with vfp C constants somewhat similar to a vTable.

Every other routine was PASCAL calling convention IIRC (~80%)

>UPDATE: Just saw that the .FLL file is just a wrapper for XICRCORE.DLL - maybe I can use that from .net ?

probably