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Professional Excel Development: The Definitive Guide to Developing Applications Using Microsoft® Excel and VBA® by John Green, Rob Bovey, Stephen Bullen

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Chapter 5. Function, General and Application-Specific Add-ins

Add-ins are the primary constituents of most nontrivial Excel applications. This chapter discusses the most important duties add-ins perform within an Excel application, as well as details about the activities various types of add-in must perform. This chapter does not cover dictator applications, as that is the subject of the next chapter.

The Four Stages of an Application

Every application has four distinct stages, regardless of the type of add-in used to implement it. These stages are development/maintenance, startup, runtime and shutdown. This section briefly discusses all four stages and identifies the activities and services that must be provided by the application during each stage. ...

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