Programming

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

By Scott Hillier

This e-book is designed to get the reader begun fast growing enterprise functions with COM+. The 5 elements of the publication surround knowing COM+ functions, information providers Layer, company providers Layer, consumer providers Layer, and the ultimate project.In the final part of the booklet, readers will placed all that they realized within the past chapters to paintings by way of constructing the PubsOnLine.com program. This program is meant as a whole studying program that makes use of some of the gains awarded within the ebook

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

Sample text

The Advanced Tab Advanced, the sixth and final tab on the component property sheet, allows you to specify the class that can handle exceptions that occur when a queued component doesn’t receive a message. Normally undelivered messages are sent to the dead-letter queue, but COM+ will attempt to call the exception class, if specified, before delivering unreceived messages to the dead-letter queue. 24 shows the Advanced tab. Installing COM+ Components into an Application After you have created a new COM+ application, you will want to install components in it.

I have been known to turn down such projects rather than suffer through the agony of shifting requirements. The best projects, however, begin with a simple problem statement. Problem Statement A problem statement is a paragraph that describes exactly why the system is being created. It clearly states the project’s objectives and what problem is to be solved. The problem statement should be free of technical acronyms. State the problem in terms of the business objective, not the technical objective.

A wise champion will be careful, however. Throwing out the stakeholders’ work will create dissention and a feeling that the sessions were simply pandering and a waste of time. In the end, however, the champion must be comfortable that the list of features can be presented to management and successfully funded. 3 DESIGNING COM+ APPLICATIONS Function 58 Understanding COM+ Applications PART I To aid in the assessment of the function list, create a new level of detailed description. To arrive at the next level of detail, the champion is asked to identify domain experts for each feature on the prioritized list.

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