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

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

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

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

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

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.

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

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

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

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.

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.

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.

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

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

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

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

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

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

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

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

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).

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.

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.

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.

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

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.