Visual Basic Programming

Visual Basic Programming Visual Basic is a third-generation event-driven programming language and integrated development environment (IDE) from
Microsoft for its COM programming model first released in 1991. Visual Basic is designed to be relatively easy to learn and use.[1][2] Visual Basic was derived from BASIC and enables the rapid application development (RAD) of graphical user interface (GUI) applications, access to databases using Data Access Objects, Remote Data Objects, or ActiveX Data Objects, and creation of ActiveX controls and objects. Scripting languages such as VBA and VBScript are syntactically similar to Visual Basic, but perform differently. A programmer can put together an application using the components provided with Visual Basic itself. Programs written in Visual Basic can also use the Windows API, but doing so requires external function declarations. Though the program has received criticism for its perceived faults,[3] from version 3 Visual Basic was a runaway commercial success,[4] and many companies offered third party controls greatly extending its functionality. The final release was version 6 in 1998. Microsoft's extended support ended in March 2008 and the designated successor was Visual Basic .NET (now known simply as Visual Basic). Microsoft released Visual Basic in 1987. It was the first visual development tool from Microsoft, and it was to compete with C, C++, Pascal and other well-known programming languages. From the start, Visual Basic wasn't a hit. It wasn't until release 2.0 in 1991 that people really discovered the potential of the language, and with release 3.0 it had become the fastest-growing programming language on the market. Programmers have undergone a major change in many years of programming various machines. For example what could be created in minutes with Visual Basic could take days in other languages such: as "C" or "Pascal". Visual Basic provides many interesting sets of tools to aid you in building exciting applications. Visual Basic provides these tools to make your life far more easier because all the real hard code is already written for you. With controls like these you can create many applications which use certain parts of windows. For example, one of the controls could be a button, which we have
demonstrated in the "Hello World" program below. First create the control on the screen, then write the code which would be executed once the control button is pressed. With this sort of operation in mind, simple programs would take very little code. Why do it like the poor old "C" programmer who would have to write code to even display a window on the screen, when Visual Basic already has this part written for you. Even though people tend to say Visual Basic's compiler is far behind the compilers of Pascal and C, it has earned itself the status of a professional programming language, and has almost freed BASIC of the reputation of a children's language. Overall you would class Visual Basic as a Graphics User Interface(GUI). Because as you draw, you write for the program. This must always be remembered in any kind of creation of a Visual Basic program. All in all, VB is the preferred language of many future program mers. If you want to start programming Windows, and don't know how to start, give Visual Basic a shot. Features of Visual Basi Visual Basic (VB) is a unique computer language---at least it was when it first came out. Now there are many imitators. VB allows you to quickly and easily develop a bank of visual controls with sliders, switches and meters or a complex form for a user to fill out. It uses the BASIC language which is known to most computer programmers, and which can be learned quickly if it is not already known. GUI Interface

VB is a Graphical User Interface (GUI) language. This means that a VB program will always sh ow something on the screen that the user can interact with (usually via mouse and keyboard) to get a job done. The first step in building the VB program is to get the GUI items on the screen. This is done via pull-down menus that list the available graphical objects. Every system is slightly different (Mac differs from Windows and VB4 Differs from VB6) but, generally speaking, left-clicking on an object allows you to describe attributes like size and position. Right clicking allows you to write code. For example, if the GUI item is a switch, left-clicking would allow the programmer to say how big the switch was, how it was labeled and where on the screen it is positioned. Right-clicking on the switch would bring up a
window that allows the programmer to write the code that describes what happens when the user clicks the switch. Modularization
It is considered good programming practice to modularize your programs. Instead of thinking of a computer program as a single large collection of code, the good programmer writes code so that you never need to look at more code than fits on the screen (or page) at one time. If you program in modules like this, the program is easier to understand and easy to update. Updating will likely be done by someone else so it is import that the program be easy to understand. Small (page size) modules where it is clearly indicated what comes into the module and what goes out makes a program easy to understand. VB forces you to program in a modular fashion because each GUI item contains part of the code---the part that applies to that GUI item.
Object Orentation
Object Oriented Programming (OOP) is a concept where the programmer thinks of the program in "objects" (however abstract the objects may be) that interact with each other. In OOP, all the code associated with that object is in one place. Once again, VB forces this good programming practice. The GUI items are the objects and all the code associated with the object are just a click away. This natural way of enforcing good programming practices---plus the ease of programming in BASIC---is exactly why VB has found so many devoted fans.

Visual Basic Programming

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Visual Basic Programming Visual Basic is a third-generation event-driven programming language and integrated development environment (IDE) from

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