Download COM + Programming with Visual Basic : The Authoritative by Scott Hillier PDF

By Scott Hillier

This e-book is designed to get the reader began quick developing company functions with COM+. The 5 components of the publication surround figuring out COM+ functions, info prone Layer, enterprise prone Layer, consumer providers Layer, and the ultimate project.In the final component to the ebook, readers will positioned all that they realized within the past chapters to paintings via constructing the software. This software is meant as an entire studying program that makes use of a few of the beneficial properties offered within the booklet

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Read or Download COM + Programming with Visual Basic : The Authoritative Solution PDF

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Additional info for COM + Programming with Visual Basic : The Authoritative Solution

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Selecting to run as a library application, on the other hand, removes all COM+ support, with the exception of role-based security, because the runtime environment isn’t used. All application support must come from the client application itself. This setting also implies that the client application must be located on the same machine as the COM+ components so that they can be loaded into the client memory space. 10 38 Understanding COM+ Applications PART I Component Services run on clients as well as servers.

These statistics are available in the listview of the Component Services explorer for the selected component. Components can be forced to run in the context of their caller by setting the Must Be Activated in Caller’s Context flag. All COM+ objects run inside a context. The context—a new feature of Windows 2000—requires a detailed explanation. I tackle this issue in the next chapter. 23). Synchronization helps ensure that only a single thread flows through an object instance at any time. Visual Basic components don’t require synchronization because they are already single-threaded.

When you have completed the compile, save your work and exit Visual Basic. Step 8 Open the COM+ Explorer. Locate My Computer and expand the treeview until you see the COM+ Applications folder. Click the folder. Then choose New/Application from the Action menu to start the Application Wizard. Step 9 In the first step of the Application Wizard, choose to create an empty application. In the second step of the Application Wizard, name the new application Simple. In the third step of the Application Wizard, set the application identity as Interactive User.

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