>Whats does Single-Threaded and Multi-Threaded mean?
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>Thanks

In VFP (as in VB) it's really Single-Threaded and Single-Thread-Apartment.

Single means that only one call to an object can be handled at a time. IOW, others have to wait for the first to get done.

Apartment means that multiple calls can be handled at once.

A multithreading search on MSDN came up with this (and more)

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dngeek/html/geekthread.asp