>>can i use a .net dll in vfp ?
>
>Yes
>
>>If so how and how can i distribute it on clients ??
>
>You may include the DLL as part of your distribution package. Then, make sure you clients have Microsoft .NET Framework.

Actually it's a lot more complicated than that. The .NET dll must be registered for COMInterop with RegAsm either through the setup program or your code. It won't just work, nor will regular COM registration work on it.