Advanced COM-based projects often require the passing of objects across threads. Besides the requirement to invoke the methods of these objects from various threads, there is sometimes even the need to fire the events of these objects from more than one thread. This two-part article is aimed at the beginner level COM developer who has just crossed the initial hurdles of understanding the basics of IUnknown and IDispatch and is now considering the use of objects in multiple threads. This is where the need to understand COM Apartments come in.I aim to explain in as much detail as possible the fundamental principles of how COM object methods ma..
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