Using COM+ Components
COM+ is the component services layer of Windows 2000 and later operating systems. COM+ supplies a number of services to components running under Windows, including the following:
Role-based security
Object pooling and reusability
Queued components for asynchronous calls
Transactional processing
A publish-and-subscribe events model
Despite the significant differences between COM+ and straight COM, you don't have to do anything different to use a COM+ component than to use a COM component. To the consumer, a COM+ component looks much like a COM component. The Type Library Importer tool and Visual Studio .NET can both create wrappers for COM+ components, using the same procedures that they use for COM components.
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