Visual Basic.NET

Introduction

2011-11-25T08:16:00.000-08:00

VISUAL BASIC is a high level programming language which evolved from the earlier DOS version called BASIC.BASIC means Beginners' All-purpose Symbolic Instruction Code. It is a very easy programming language to learn. The code look a lot like English Language. Different software companies produced different versions of BASIC, such as Microsoft QBASIC, QUICKBASIC, GWBASIC ,IBM BASICA and so on. However, people prefer to use Microsoft Visual Basic today, as it is a well developed programming language and supporting resources are available everywhere. Now, there are many versions of VB exist in the market, the most popular one and still widely used by many VB programmers is none other than Visual Basic 6. We also have VB.net, VB2005, VB2008 and the latest VB2010. Both Vb2008 and VB2010 are fully object oriented programming (OOP) language.

VISUAL BASIC is a VISUAL and events driven Programming Language. These are the main divergence from the old BASIC. In BASIC, programming is done in a text-only environment and the program is executed sequentially. In VB, programming is done in a graphical environment. In the old BASIC, you have to write program code for each graphical object you wish to display it on screen, including its position and its color. However, In VB , you just need to drag and drop any graphical object anywhere on the form, and you can change its color any time using the properties windows.

On the other hand, because the user may click on a certain object randomly, so each object has to be programmed independently to be able to response to those actions (events). Therefore, a VB Program is made up of many subprograms, each has its own program code, and each can be executed independently and at the same time each can be linked together in one way or another.

Keywords

2011-11-24T18:09:00.001-08:00

Keywords are words with special meaning in a programming language. In Visual Basic .NET, keywords are reserved; that is, they cannot be used as tokens for such purposes as naming variables and subroutines.

Keyword table

Microsoft .NET Framework

2011-11-24T18:05:00.001-08:00

The .NET Framework is the next iteration of Microsoft's platform for developing component-based software. It provides fundamental advances in runtime services for application software. It also supports development of applications that can be free of dependencies on hardware, operating

system, and language compiler.

This chapter provides an overview of the architecture of the .NET Framework and describes the base features found in the core of its class library.

Common Language Infrastructure (CLI) and Common Language Runtime (CLR)
Common Type System (CTS)
Namespaces
Portions of the CLI
Modules and Assemblies
Global Assembly Cache (GAC)
Comparison of Assemblies, Modules, and Namespaces
Application Domains
Common Language Specification (CLS)
Intermediate Language (IL) and Just-In-Time (JIT) Compilation
Metadata
Memory Management and Garbage Collection
Finalize
Dispose
A Brief Tour of the .NET Framework Namespaces
Configuration File Format
Configuration Section Groups
The <appSettings> Section

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