It uses the VFPt.dll multi-threaded runtime. Are you sure you read Calvin's paper? He explained all this.. How can you talk so confidently about this when you don't even grasp the basics of how it works?? And I can tell you from several years of experience with ActiveVFP that it is indeed threadsafe.....And nothing is queued -ALL SIMULTANEOUS - read the paper or try testing it yourself.

>Then, since the runtimes themselves are not threadsafe, how can this work in a threadsafe manner?
Either the calls have to be queued (which is not my idea of multithreading) or you have problems.

>The boast of mtdll is that only one instance of the runtimes is instantiated and used by all subsequent threads.