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Introduction to Computers and Visual Basic

Learn about computer hardware and software, programming languages, and Windows applications in this introductory chapter. Discover the basics of using Windows, organizing files and folders, and the history of Visual Basic.

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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 Objectives • Introduction to Computers • Using Windows • Files and Folders • An Introduction to Visual Basic Chapter 1- Visual Basic Schneider

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

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

  5. 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 (volatile). Chapter 1- Visual Basic Schneider

  6. Programming Languages: • Machine Language • High level Language Chapter 1- Visual Basic Schneider

  7. Machine Language • The fundamental language of the computer’s processor, also called Low Level Language. • All programs are converted into machine language before they can be executed. Chapter 1- Visual Basic Schneider

  8. High Level Language • Computer (programming) languages that are easier to learn. • Uses English like statements. • Examples are C++, Visual Basic, and Java Chapter 1- Visual Basic Schneider

  9. Software: • Instructions for the hardware. • A collection of instructions is called a program. Chapter 1- Visual Basic Schneider

  10. Using Windows • Basic techniques to use the mouse: • Pointing: moving mouse until the pointer is above desired object on the screen • Clicking: press and release the left mouse button once • Dragging (drag and drop): hold object, move it , then release • Double-Clicking: clicking the left mouse button twice in quick succession. • Hovering: lingering mouse at particular place and waiting for a message or menu to appear Chapter 1- Visual Basic Schneider

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

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

  13. Files & Folders: • 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

  14. Key Terms in using Folders • Root folder • Path: A nested sequence of folders • Example: \Temp\MyProjects\ • File Specification: A drive letter, path, and filename • Example: A:\Temp\MyProjects\Example.vbp Chapter 1- Visual Basic Schneider

  15. 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. Chapter 1- Visual Basic Schneider

  16. 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. Chapter 1- Visual Basic Schneider

  17. Terminology used in Visual Basic: • Form • Control • Object • Properties • Event Chapter 1- Visual Basic Schneider

  18. Steps to Design a Visual Basic Application • Design 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. Chapter 1- Visual Basic Schneider

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