EYAD ALSHAREEF

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Introduction

• EYAD ALSHAREEF

www.just.edu.jo/eyad
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Outline and Objective

• Introduction to Computers
• Understanding the window layout
• Introduction to Visual Basic

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What is a Computer?

• Device
• Computations addition, multiplication
• Making Logical Decisions comparisons
• Very High Speed millions faster than human
  beings

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Computer Organization

• Hardware Electronic Devices Circuits
• Software Instructions or Computer Programs

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Six logical units of computer

• Input unit
• Receiving section
• Obtains information from input devices
• Keyboard, mouse, microphone, scanner, networks,
• Output unit
• Shipping section
• Takes information processed by computer
• Places information on output devices
• Screen, printer, networks,
• Information used to control other devices

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Six logical units of computer

• Memory unit
• Rapid access, relatively low capacity warehouse
  section
• Retains information from input unit
• Immediately available for processing
• Retains processed information
• Until placed on output devices
• Memory, primary memory
• Arithmetic and logic unit (ALU)
• Manufacturing section
• Performs arithmetic calculations and logic
  decisions

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Six logical units of computer

• Central processing unit (CPU)
• Administrative section
• Supervises and coordinates other sections of
  computer
• Secondary storage unit
• Long-term, high-capacity warehouse section
• Storage
• Inactive programs or data
• Secondary storage devices
• Disks
• Longer to access than primary memory
• Less expensive per unit than primary memory

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Control Unit (CU)

• Directs the order in which commands are executed.
• Communicates with input and output devices.
• Transfers data to and from the primary storage
  unit and various input and output devices.

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Memory

• Memory is a Temporary Storage

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Types of Memory

• Random Access Memory (RAM)
• Read Only Memory (ROM)

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Random Access Memory(RAM)

• Stores program instructions and data needed for
  processing.
• Stores intermediate and final results of
  processing.
• It is volatile.

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Software

• Instructions for the hardware.
• A collection of lines of instruction is called
• Program

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Types of Software

• System Software
• Application Software

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System Software (Operating System)

• Is the interface between you and hardware.
• Is the interface between application software and
  hardware.

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Examples of System Software

• UNIX
• MS-DOS
• Windows 98 / NT

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Examples of Application Software

• Word Processing
• Spreadsheet
• Accounting
• Programming Languages Visual Basic, C, Pascal

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Window Layout

• Reviewing Notepad to learn more about windows
  layout
• Notepad is an item in the Accessories menu

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Notepad Window
Title bar
Menu bar
Vertical scroll bar
Work area
Horizontal scroll bar
Scroll box
Scroll arrow
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Notepad Window

• Title bar

Maximize button
Close button
Minimize button
Title Text
Control-menu box
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Notepad Window

• A menu and its options

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Notepad Window

• Save As Dialog Box

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Notepad Window

• Message Box

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History of Visual Basic

• Uses the BASIC language
• VB was developed by the Microsoft Corporation
• Version 1.0 released in May of 1991
• Version 2.0 was released in October of 1992
• Version 3.0 was released in May of 1993
• Version 4.0, released in September of 1995
• Version 5.0 was released in March of 1997
• Version 6.0 was released in August of 1998

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Introduction to Visual Basic

• It is a Windows programming language
• Language used to create windows application
• Provides a Graphical User Interface (GUI)

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Introduction to Visual Basic

• Input screen of a DOS-based BASIC program to fill
  a database
• ____________________________________________
• Enter Name (Enter EOD to terminate) Mr.
  President
• Enter Address 1600 Artesian
• Enter City Detroit
• Enter State MI
• Enter Phone Number 313-982-1011
• _____________________________________________

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Introduction to Visual Basic
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Introduction to Visual Basic

• Integrated Development Environment (IDE)
• Editor, Compiler, Form Builder, Debugger
• Rapid Application Development (RAD) tool
• Event-driven programming language
• The sequence of instructions executed in the
  program is controlled by events, like mouse click.

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Hierarchy of VB Application

• Application
• Application Properties
• Forms
• Properties
• Event Handlers
• Controls
• Properties
• Event Handlers

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Hierarchy of VB Application
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Steps to Design a Visual Basic Application

• 1. Create the interface (forms controls)
• 2. Set properties for forms controls
• 3. Write code for appropriate events