2. Chapter 1- Visual Basic Schneider1 Chapter 1 An Introduction to Computers and Visual Basic

3. Chapter 1- Visual Basic Schneider2 Outline and Objective –Introduction to Computers –Using Windows –Disk and Folders –An Introduction to Visual Basic

4. Chapter 1- Visual Basic Schneider3 Parts of a Computer System: Hardware: Electronic Devices & Circuits Software: Instructions or Computer Programs

5. Chapter 1- Visual Basic Schneider4 Main components of Hardware: Input : Keyboard & Mouse System unit: Central Processing Unit (CPU) & Memory Output: Monitor Secondary Storage: Disk Drive

6. Chapter 1- Visual Basic Schneider5 Central Processing Unit (CPU): Control Unit (CU) Arithmetic Logic Unit (ALU)

7. Chapter 1- Visual Basic Schneider6 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.

8. Chapter 1- Visual Basic Schneider7 Arithmetic Logic Unit (ALU) Performs calculations (adds, subtracts, multiplies, divides) Makes logical comparisons (=, <>,, =)

9. Chapter 1- Visual Basic Schneider8 Memory: Memory is a Temporary Storage

10. Chapter 1- Visual Basic Schneider9 Types of Memory: Random Access Memory (RAM) Read Only Memory (ROM)

11. Chapter 1- Visual Basic Schneider10 Random Access Memory (RAM) Stores program instructions and data needed for processing. Stores intermediate and final results of processing. It is volatile.

12. Chapter 1- Visual Basic Schneider11 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.

13. Chapter 1- Visual Basic Schneider12 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.

14. Chapter 1- Visual Basic Schneider13 Software: Instructions for the hardware. A collection of lines of instruction is called a Program.

15. Chapter 1- Visual Basic Schneider14 Types of Software: System Software Application Software

16. Chapter 1- Visual Basic Schneider15 System Software (Operating System): Is the interface between you and hardware. Is the interface between application software and hardware.

17. Chapter 1- Visual Basic Schneider16 Examples of System Software: UNIX MS-DOS Windows 98 / NT

18. Chapter 1- Visual Basic Schneider17 Examples of Application Software : Word Processing Spreadsheet Accounting Programming Languages: Visual Basic, C++, Pascal

19. Chapter 1- Visual Basic Schneider18 Using Windows Basic techniques to use the mouse: –Pointing –Clicking –Dragging –Double-Clicking

20. Chapter 1- Visual Basic Schneider19 Key Terms in using Windows Title Bar Active window Dragging a window

21. Chapter 1- Visual Basic Schneider20 Using Windows –Reviewing Notepad to learn more about Windows application –Notepad is an item in the Accessories menu

22. Chapter 1- Visual Basic Schneider21 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).

23. Chapter 1- Visual Basic Schneider22 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.

24. Chapter 1- Visual Basic Schneider23 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.

25. Chapter 1- Visual Basic Schneider24 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.

26. Chapter 1- Visual Basic Schneider25 Terminology used in Visual Basic: Forms Controls Objects Properties Events

27. Chapter 1- Visual Basic Schneider26 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.