Chapter 3. Visual Basic Programming Essentials
The one thing you should have learned about programming in Visual Basic so far is that an application is made up of small, self-contained segments. The code you write isn't a monolithic listing; it's made up of small segments called procedures, and you work on one procedure at a time.
In this chapter we'll explore the two types of procedures supported by Visual Basic: subroutines and functions — the building blocks of your applications. We'll discuss them in detail: how to call them with arguments and how to retrieve the results returned by the functions. You'll learn how to use the built-in functions that come with the language as well as how to write your own subroutines and functions.
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