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Introduction to Computers and Visual Basic

Explore the basics of computers and learn how to create applications using Visual Basic. Understand hardware components, software instructions, memory, and more.

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Introduction to Computers and Visual Basic

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

  2. Outline and Objective Introduction to Computers Using Windows Disk and Folders An Introduction to Visual Basic Chapter 1- Visual Basic Schneider

  3. Parts of a Computer System: • Hardware: Electronic Devices & Circuits • Software: Instructions or Computer Programs Chapter 1- Visual Basic Schneider

  4. Main components of Hardware: • Input : Keyboard & Mouse • System unit: Central Processing Unit (CPU) & Memory • Output: Monitor • Secondary Storage: Disk Drive Chapter 1- Visual Basic Schneider

  5. Central Processing Unit (CPU): • Control Unit (CU) • Arithmetic Logic Unit (ALU) Chapter 1- Visual Basic Schneider

  6. 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. Chapter 1- Visual Basic Schneider

  7. Arithmetic Logic Unit (ALU) • Performs calculations (adds, subtracts, multiplies, divides) • Makes logical comparisons (=, <>, <, >, <=, >=) Chapter 1- Visual Basic Schneider

  8. Memory: • Memory is a Temporary Storage Chapter 1- Visual Basic Schneider

  9. Types of Memory: • Random Access Memory (RAM) • Read Only Memory (ROM) Chapter 1- Visual Basic Schneider

  10. Random Access Memory (RAM) • Stores program instructions and data needed for processing. • Stores intermediate and final results of processing. • It is volatile. Chapter 1- Visual Basic Schneider

  11. What is a Bit? • Computers use binary system to process data. • The smallest unit of computer memory is bit. • A bit is basically an on/off switch and is usually described as a 1 or 0. Chapter 1- Visual Basic Schneider

  12. What is a Byte? • A byte is a pattern of 8 bits. • A byte is also called a character. • Additional units of memory are defined by powers of 2. Chapter 1- Visual Basic Schneider

  13. Software: • Instructions for the hardware. • A collection of lines of instruction is called a Program. Chapter 1- Visual Basic Schneider

  14. Types of Software: • System Software • Application Software Chapter 1- Visual Basic Schneider

  15. System Software (Operating System): • Is the interface between you and hardware. • Is the interface between application software and hardware. Chapter 1- Visual Basic Schneider

  16. Examples of System Software: • UNIX • MS-DOS • Windows 98 / NT Chapter 1- Visual Basic Schneider

  17. Examples of Application Software: • Word Processing • Spreadsheet • Accounting • Programming Languages: Visual Basic, C++, Pascal Chapter 1- Visual Basic Schneider

  18. Using Windows • Basic techniques to use the mouse: • Pointing • Clicking • Dragging • Double-Clicking Chapter 1- Visual Basic Schneider

  19. Key Terms in using Windows • Title Bar • Active window • Dragging a window Chapter 1- Visual Basic Schneider

  20. Using Windows • Reviewing Notepad to learn more about Windows application • Notepad is an item in the Accessories menu Chapter 1- Visual Basic Schneider

  21. Disks & Folders: • Disk is a permanent storage. • Disk management is handled by the Operating System. • A disk can store thousands of files. • To organize your files you have to store them in different folders (directories). Chapter 1- Visual Basic Schneider

  22. Key Terms in using Folders • Root folder • Path Example: A:\Temp\MyProjects\project1.vbp • File Specification: You should always know where you are saving your files. Chapter 1- Visual Basic Schneider

  23. History of Visual Basic: • BASIC stands for Beginner’s All-purpose Symbolic Instruction Code. • Developed by John Kemeny and Thomas Kurtz in mid-1960s. • Visual Basic was developed in mid-1991 by the Microsoft Corporation. Chapter 1- Visual Basic Schneider

  24. Introduction to Visual Basic: • Language used to create windows application. • Provides a Graphical User Interface or GUI. • The sequence of instructions executed in the program is controlled by events. Chapter 1- Visual Basic Schneider

  25. Terminology used in Visual Basic: • Forms • Controls • Objects • Properties • Events Chapter 1- Visual Basic Schneider

  26. Steps to Design a Visual Basic Application • Decide on the Interface for the user. (Forms & Controls) • Determine which events the objects on the window should recognize. • Write the events procedures for those events. Chapter 1- Visual Basic Schneider

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