Intro visual basic.net program

Assembler ASM for short is no simpler than machine code, but at least it's human readable! Here, the instructions have human readable text codes, so that people wouldn't have to memorize every single one of the number combinations. The instruction codes are later compiled into binary code.

Adding two numbers up in ASM would go something like this:. It's a bit more human-readable, but most people, including me, would still have no clue how this program works. Third generation languages finally give a good amount of abstraction of how the program is seen by the computer.

Rather than forcing us to adapt to the computer's arcane way of thinking, the languages focused a bit more on how we see the program. Numbers were then perceived as variables and code had an almost "mathematical-notation" sort of aesthetic. Pretty much anyone could assume what this program does just by looking at it. It sums 83 and -2 up, and stores the result in a variable named c.

The main advantage third generation languages had over all of the previous languages was high readability. As time went on and code optimization was in demand, object-oriented programming was brought into play, which we will get into later. Third generation languages are essentially divided into the following categories:. Compiled aka unmanaged languages have their source code in a language that people can fully understand. The source code must still be translated into machine code so that it can be executed by the processor.

This translation is provided by a compiler, which compiles the entire program into machine code. Interpreted languages make an attempt to solve program portability issues, and make programmers' lives a bit easier.

Interpreters work much like compilers do, but instead of translating the entire program all at once, they only translate what is needed at a given moment in time. Its name comes from the human profession of Interpretation.

Where an interpreter is someone who listens and serves as a "middle man" for people who do not speak the same language. The translation is done while each one speaks. Interpreted languages work in pretty much the same way. The source code is read line by line, compiled into machine code, executed, and then thrown away. Interpretation is a waste of processor power, of sorts, and is not the fastest way to get things done.

PHP is an interpreted language. Most websites are written in this relatively easy language because it gets the job done right. Hmm, now what if we took the best of both approaches and left out most of the disadvantages? Thus, the virtual machine was born! Virtual machines are the most advanced kind of programming languages, currently the most widespread and the best choice for developing most applications. NET, C , and Java belong to this category.

First and foremost, the source code is translated into what we call "Intermediate code". However, it has a considerably simpler instruction set and directly supports object-oriented programming.

Due to its higher simplicity, intermediate code can be interpreted relatively quickly by the virtual machine i. By using a virtual machine, we essentially eliminate both the interpreter and compiler's disadvantages, while still using most of their advantages :. Languages with VM are designed for object-oriented programming and is the most modern way to develop software. There are also languages of 4th and 5th generation, but they are very specific and we won't cover them today.

NET Framework 1. The latest version of Visual Basic is Visual Basic Introduction. What is Visual Basic VB? Overview of Visual Basic VB Visual Basic VB is an object-oriented programming language and it supports the concepts of encapsulation, abstraction, polymorphism, etc. Visual Basic VB is developed specifically for. After installing the vb6 compiler, the icon will appear on your desktop or in your programs menu. Click on the icon to launch the VB6 compiler.

On start up, Visual Basic 6. Figure 1. A project is a collection of files that make up your application. There are various types of applications that we could create, however, we shall concentrate on creating Standard EXE programs EXE means executable.

Before you begin, you must think of an application that preferably have commercial ,educational or recreational value. It consists of the toolbox, the form, the project explorer and the properties window. The Form is the primary building block of a Visual Basic 6 application. A Visual Basic 6 application can actually comprise many forms, but we shall focus on developing an application with one form first.

We will learn how to develop applications with multiple forms later. Before you proceed to build the application, it is a good practice to save the project first. You can save the project by selecting Save Project from the File menu, assign a name to your project and save it in a certain folder.

You shall now proceed to learn Visual Basic programming from the next lesson onwards. Liew Voon Kiong. All rights reserved Contact Privacy Policy.