By Scott Hillier

This publication is designed to get the reader begun quick growing enterprise purposes with COM+. The 5 components of the publication surround figuring out COM+ functions, facts prone Layer, company providers Layer, consumer providers Layer, and the ultimate project.In the final element of the publication, readers will placed all that they discovered within the prior chapters to paintings by means of constructing the program. This program is meant as an entire studying program that makes use of a few of the beneficial properties awarded within the ebook

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Extra resources for COM + Programming with Visual Basic : The Authoritative Solution

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5 34 Understanding COM+ Applications PART I node found at the bottom of the COM+ explorer. Refreshing COM+ components is useful any time you install a new version of a DLL into COM+. This is common during development, but also happens when new versions are rolled out. 7 The Default Protocols tab. Application Properties COM+ components are grouped under a server into COM+ applications. The term application is somewhat misleading when used in this context because developers might tend to think of executable content.

To overcome this problem, you can enable COM Internet Service on the Default Properties tab. 5), COM+ components use port 80 to perform an initial handshake that establishes connectivity through a firewall or proxy server. This allows you to create true distributed applications that work across the Internet. COM Internet Services require the use of a special moniker called OBJREF that allows a browser to locate a running component on a Web server. The Default Security Tab The Default Security tab allows you to set default access and launch permission for COM applications running on this server.

This enables the system to be evaluated and changed more easily than if you move directly Designing COM+ Applications CHAPTER 3 59 from requirements to code. The text-based model of the system is created through a set of use cases. A use case is a description of the set of steps necessary to accomplish a function. A complete set of use case describes at least 80% of the system and is the basis for more detailed modeling. Identifying Actors and Use Cases Before you can create a use case, you must identify the actors involved in your system.

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