By John Mueller
Aimed squarely on the skilled developer who has labored with COM and is past the fundamentals of COM+. indicates how COM+ can be utilized in either the final and company programming environments. provides 5 severe and completely sensible programming examples that reveal a wide selection of strength COM+ makes use of. Covers the 2 new gains of the COM+ surroundings -MSMQ(Microsoft administration Queue) and MTS (Microsoft Transaction Server).
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Additional info for COM+ Developer's Guide
However, the fact that COM+ provides a wrapper for making all of these technologies work together is a new idea. Microsoft has found that it’s not enough to provide disparate services that could allow applications to talk with servers using components rather than some of the older technologies we relied on in the past. Creating a single package for all of these technologies is the way to ensure that programmers will actually use the technologies that Microsoft has provided. COM+ isn’t merely a wrapper for existing services, however.
There are five methods available for remote object creation: CoCreateInstanceEx(), CoGetInstanceFromFile(), CoGetInstanceFromStorage(), CoGetClassObject(), and CoGetClassObjectFromURL(). ■ Service Control Manager (SCM) Creates the initial connection between the client and server. The SCM is only used during object creation. DLL file. ■ Proxy The server’s presence within the client’s address space. The proxy, which is actually a table of interfaces, is created and managed by the operating system at the request of the COM runtime.
The DLLs used for displaying various types of foreign data, on the other hand, are normally accessed directly from the code in your application. In short, in-process servers, for the most part, are part of the application you create from the very beginning of the design process. A new category of in-process server includes the Microsoft Management Console (MMC) snap-ins used in Windows 2000. MMC itself is simply a container used to hold the snap-ins. The snap-ins are DLLs that allow a network administrator to monitor and configure various elements within Windows 2000.