An Introduction to Computers and Visual Basic Chapter 1- Visual Basic Schneider1.

An Introduction to Computers and Visual Basic

Chapter 1- Visual Basic Schneider 1

Introduction to ComputersUsing Windows

Files and FoldersAn Introduction to Visual Basic


Parts of a Computer System:Hardware: Electronic Devices Software: Instructions and Computer

Programs


Main components of Hardware:Input : Keyboard, MouseSystem unit:

Random Access Memory (RAM)Central Processing Unit (CPU)

Output: Monitor, PrinterSecondary Storage: Disk Drive


Random Access Memory (RAM) Stores program instructions and data needed

for processing.Stores intermediate and final results of

processing.Contents are erased when computer is turned

off or reset.


Programming Languages:Machine Language High level Language


Machine LanguageThe fundamental language of the

computer’s processor, also called Low Level Language.

All programs are converted into machine language before they can be executed.


High Level LanguageComputer (programming) languages that are

easier to learn.Uses English like statements.Examples are C++, Visual Basic, and Java


Software:Instructions for the hardware.A collection of instructions is called a

program.


Using Windows Basic techniques to use the mouse:

PointingClickingDraggingDouble-ClickingHovering


Key Terms in using WindowsTitle BarActive windowDragging a window


Using WindowsReviewing Notepad to learn more about

Windows applicationsNotepad is an item in the Accessories menu


Files & Folders:A disk can store thousands of files.To organize your files you have to store

them in different folders (directories).File name consists of letters, digits,

periods and other assorted characters.The following character cannot be used in

a file or folder name /, \, ?, *, :, ”, <, >, |A File name can contain up to 215

characters


Key Terms in using FoldersRoot folderPath: A nested sequence of folders

Example: A:\Temp\MyProjects\File Specification: A drive letter, path, and

filenameExample: A:\Temp\MyProjects\Example.vbp


History of Visual Basic:BASIC stands for Beginner’s All-purpose

Symbolic Instruction Code.BASIC was developed by John Kemeny

and Thomas Kurtz in mid-1960s.Visual Basic was released in 1991 by the

Microsoft Corporation.


Introduction to Visual Basic:A language used to create windows

applications.Programs are developed with a Graphical

User Interface or GUI.The instructions executed in the program are

controlled by events.


Terminology used in Visual Basic:FormControlObjectPropertiesEvent


Steps to Design a Visual Basic ApplicationDesign the appearance of the window that

the user sees.Determine the events that the controls on

the window should recognize.Write the event procedures for those

events.


An Introduction to Computers and Visual Basic Chapter 1- Visual Basic Schneider1.

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