1.1 The concept of computer programming
Programming means designing a set of instructions to
instruct the computer to carry out certain jobs that are very much
faster than human beings can do.
The earliest programming language is called machine language that uses
binary codes comprises 0 and 1 to communicate with the computer. Machine
language is extremely difficult to learn .
Fortunately , scientists have invented high level programming languges
that are much easier to master.
Some of the high level programming languages are Java, Javascript, C, C++, c# and Visual Basic.
1.2 What is Visual Basic?
VISUAL BASIC is a high level programming language that evolved from the earlier DOS version called BASIC. BASIC means Beginners' All-purpose Symbolic Instruction Code. The code looks a lot like English Language. Now, there are many versions of Visual Basic available in the market, the lastest being Visual Basic 2015 that is bundled with other programming languages such as C#. However, the most popular one and still widely used by many VB programmers is none other than Visual Basic 6. .VISUAL BASIC is a VISUAL Programming Language because programming is done in a graphical environment. In VB6 , you just need to drag and drop any graphical object anywhere on the form and click on the object to enter the code window and start programming.
Note:
In addition, Visual Basic 6 is Event-driven because we need to
write code that performs some tasks to response to certain events.
The events usually comprises but not limited to the user's inputs. Some
of the events are load, click, double click, drag and drop, pressing
the keys and more. We will learn more about events in later lessons.
Besides that, a VB6 Program is made up of many subprograms or modules,
each has its own program code, and each can be executed independently;
they can also be linked together in one way or another.
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