Visual Basic is a visual programming language and event driven. These are the most important departure from the old BASIC. In BASIC, programming is done in a text-only and the program is executed sequentially. In VB, programming is done in a graphical environment. In the old BASIC, you must write code for each graphic object you want to display it on the screen, including its position and color. But in VB, you just drag and drop any graphical object anywhere on the form, and you can change color at any time using the Properties window.

On the other hand, the user can click on a certain object randomly, so that each object must be programmed independently to be able to respond these actions (events). Therefore, a VB program consists of many subprograms, each has its own code, and each can be performed independently and simultaneously, each can be linked together in one way or another.