George,
Sorry, for most intents and purposes vfp multi-threaded dlls(mtdlls) are indeed multithreaded(thus the name). Multiple threads are running at the same time. The technology behind it doesn't really matter as far as this is concerned...
>>VFP mtdlls are multithreaded but must be called from a multithreaded .exe client like IIS or something written in C++. However, you can easily accomplish what you want in standard old VFP - This will fire off a background VFP task and allow the calling VFP app to continue:
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>Claude,
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>No VFP dlls are not multi-threaded. They are apartment model. A multi-threaded dll in VFP does handle, however, the marshalling problems normally associated with apartment model threading.