Visual Basic.NET How to Program (PDF)

88 Introduction to Visual Basic Programming Chapter 3
Label
Button
(displaying an icon) Menu (e.g., Help) Text box
Menu bar
Fig. Fig. 3.26 3.26 Internet Explorer window with GUI components.
www.cyber-matrix.com/vb.htm
This site links to Visual Basic tutorials, books, tips and tricks, controls, programming tools, magazines,
news groups and more.
searchvb.techtarget.com
This site offers a search engine designed specifically to discover Visual Basic Web sites.
www.aewnet.com/root/dotnet/vbnet
The site links to demos, articles, tutorials, and to other Visual Basic .NET sites in various languages
(e.g., German).
SUMMARY
A console application is an application that primarily displays text output in a command window.
In Microsoft Windows 95/98, the command window is called the MS-DOS prompt. In Microsoft
Windows NT/2000/XP, the command window is called the command prompt.
The single quote character, ', indicates that the remainder of a line is a comment.
Programmers insert comments in a program to improve the readability of their code. Comments
are ignored by the Visual Basic compiler; they do not cause the computer to perform any actions
when the program is run.
Visual Basic console applications consist of pieces called modules, which are logical groupings of
procedures that simplify program organization.
Procedures perform tasks and can return information when the tasks are completed. Every console
application in Visual Basic consists of at least one module definition and one procedure.
Keywords are words that are reserved for use by Visual Basic; programmers must choose other
names as identifiers.
The name of a module is an example of an identifier. An identifier is a series of characters, consisting
of letters, digits and underscores ( _ ), that does not begin with a digit and does not contain
spaces.