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Event Support

Of the new component services provided by COM+, event support is one of the most useful to Visual Basic programmers. COM+ events form a mechanism for enabling one COM+ component to receive events fired by another. In and of itself, this might not seem like a new feature. After all, Visual Basic has supported the Event keyword for some time. COM+ events, however, are said to be loosely coupled. This means that event receivers (called subscribers) don't need specific knowledge of event providers (called publishers). In fact, a COM+ component can subscribe to any published event at any time. This significantly simplifies application development as you add new features to a system.

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