I can only give examples of ASP.NET using C# calling multiple threads of a .vfp. mtdll which I do all of the time from IIS. However, this is probably not what you're looking for. You might want to try http://msdn.microsoft.com/library/?url=/library/en-us/dnfoxgen7/html/usingaspnetwithvfp7.asp or http://www.west-wind.com/presentations/VfpDotNetInterop/aspcominterop.asp . I'd also be surprised if Calvin Hsia of MS hasn't done this with C# in one of his Devcon sessions... >Thanks Claude, >I may just be short on understanding, but if I call a C# function from each thread, the results are as I would expect... > >After reading the articles you suggested, I am still pretty unsure of what change I might need to make to the code... > >Can anyone point me to a sample, where .NET calls a VFP COM on multiple threads? > >TIA