1 / 31

Introduction

Introduction. EYAD ALSHAREEF. www.just.edu.jo/~eyad. Outline and Objective. Introduction to Computers Understanding the window layout Introduction to Visual Basic. What is a Computer?. Device Computations : addition, multiplication Making Logical Decisions : comparisons

afram
Download Presentation

Introduction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Introduction EYAD ALSHAREEF www.just.edu.jo/~eyad

  2. Outline and Objective Introduction to Computers Understanding the window layout Introduction to Visual Basic

  3. What is a Computer? • Device • Computations : addition, multiplication • Making Logical Decisions : comparisons • Very High Speed:millions faster than human beings

  4. Computer Organization • Hardware: Electronic Devices & Circuits • Software: Instructions or Computer Programs

  5. 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

  6. 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

  7. 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

  8. 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.

  9. Memory • Memory is a Temporary Storage

  10. Types of Memory • Random Access Memory (RAM) • Read Only Memory (ROM)

  11. Random Access Memory(RAM) • Stores program instructions and data needed for processing. • Stores intermediate and final results of processing. • It is volatile.

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

  13. Types of Software • System Software • Application Software

  14. System Software(Operating System) • Is the interface between you and hardware. • Is the interface between application software and hardware.

  15. Examples of System Software • UNIX • MS-DOS • Windows 98 / NT

  16. Examples of Application Software • Word Processing • Spreadsheet • Accounting • Programming Languages: Visual Basic, C++, Pascal

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

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

  19. Notepad Window • Title bar Maximize button Control-menu box Title Text Minimize button Close button

  20. Notepad Window A menu and its options

  21. Notepad Window Save As Dialog Box

  22. Notepad Window Message Box

  23. 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

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

  25. 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 _____________________________________________

  26. Introduction to Visual Basic

  27. 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.

  28. Hierarchy of VB Application • Application • Application Properties • Forms • Properties • Event Handlers • Controls • Properties • Event Handlers

  29. Hierarchy of VB Application

  30. 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

More Related