an introduction to computers and visual basic chapter 1- visual basic schneider1
TRANSCRIPT
An Introduction to Computers and Visual Basic
Chapter 1- Visual Basic Schneider 1
Introduction to ComputersUsing Windows
Files and FoldersAn Introduction to Visual Basic
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Parts of a Computer System:Hardware: Electronic Devices Software: Instructions and Computer
Programs
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Main components of Hardware:Input : Keyboard, MouseSystem unit:
Random Access Memory (RAM)Central Processing Unit (CPU)
Output: Monitor, PrinterSecondary Storage: Disk Drive
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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.
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Programming Languages:Machine Language High level Language
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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.
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High Level LanguageComputer (programming) languages that are
easier to learn.Uses English like statements.Examples are C++, Visual Basic, and Java
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Software:Instructions for the hardware.A collection of instructions is called a
program.
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Using Windows Basic techniques to use the mouse:
PointingClickingDraggingDouble-ClickingHovering
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Key Terms in using WindowsTitle BarActive windowDragging a window
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Using WindowsReviewing Notepad to learn more about
Windows applicationsNotepad is an item in the Accessories menu
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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
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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
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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.
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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.
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Terminology used in Visual Basic:FormControlObjectPropertiesEvent
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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.
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