By Christian Gross

Starting VB 2008 has been written to coach you ways to exploit the visible easy programming language to resolve difficulties. From the earliest chapters, and from the 1st introductory ideas, you’ll be real-world programming demanding situations and studying how visible easy can be utilized to beat them. As you move in the course of the ebook the issues turn into extra concerned and engaging whereas the suggestions develop into correspondingly extra advanced and strong as visible easy positive aspects engage to accomplish the consequences that you simply want.
By the time you’ve accomplished examining this publication and labored during the pattern routines, you’ll be a convinced and intensely powerfuble visible uncomplicated programmer. you are going to nonetheless have many explorations of the .NET Framework API to seem ahead to on your destiny profession, yet you've an organization beginning to construct from and you may comprehend precisely the place to visit locate the issues it's essential to development expectantly on your projects




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4. vb. 5. Save the solution. We can now write the Add() method. vb file. Public Class Operations Public Shared Function Add(ByVal number1 As Integer, ByVal number2 As _ Integer) As Integer Return number1 + number2 End Function End Class This simple code actually has many different pieces that fit together. The type Operations is implied to be in the namespace Calculator because the default root namespace is the same as the project. Defined within Operations is a method that is both Public and Shared.

In order for applications to actually share the code that’s in a class library, you must make the projects aware of each other’s existence. You do that through references. Defining References To make one project aware of definitions in another project, you need to define a reference. The idea behind a reference is to indicate that a project knows about another piece of functionality. ■Note The project only knows about the functionality that has been declared as being public. Public functionality, or what Visual Basic programmers call public scope, is when you declare a type with the Public keyword.

To get a clear understanding of the problem, imagine the development of a tire. Do you define the tests for the tire before or after the tire has been developed? Most likely, the answer is before, during, and after development. This is an important consideration when developing software. NE T N UMBER A ND VA LUE TYPES • You develop tests before implementing the Add() method to get an idea of what namespaces, classes, and methods you will be defining. The definition of the different items gives the developer an idea of how the items will be used.

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