Microsoft visual basic 2010

Microsoft Visual Basic 2010: Reloaded Fourth Edition Chapter One An Introduction to Visual Basic 2010  2009 Pearson Education, Inc. All rights reserved. 2 Overview ■ What Is a Computer? ■ Machine, Assembly and High-Level Languages ■ Visual Basic & Other High-Level Languages ■ Object Technology ■ The Internet and the World Wide Web ■ Introduction to Microsoft .NET ■ Language and Syntax ■ Visual Studio 2010 IDE ■ Solutions and Projects ■ Creating a New Project ■ Examples  2009 Pearson Education, Inc. All rights reserved. 3 What Is a Computer? ■ A computer is a device that can perform calculations and make logical decisions much faster than humans can. ■ Computers process data, using sets of instructions called computer programs. – These programs guide computers through orderly sets of actions that are specified by people known as computer programmers.  2009 Pearson Education, Inc. All rights reserved. 4 What Is a Computer? ■ A computer is composed of various devices known as hardware: – keyboard – screen – mouse – hard drives – memory – DVD drives – printer – processing units ■ The programs that run on a computer are referred to as software.  2009 Pearson Education, Inc. All rights reserved. 5 Computer Components Computers can be thought of as being divided into six units: ■ Input unit: This “receiving” section of the computer obtains information from input devices. – Input can come from devices such as the keyboard and the mouse. ■ Output unit: This “shipping” section of the computer takes information that the computer has processed and places it on various output devices. – Output can be displayed on screens, printed on paper, played on audio/video devices, and transmitted over the Internet.  2009 Pearson Education, Inc. All rights reserved. 6 Computer Components ■ Memory unit: This “warehouse” section of the computer stores data while an application is running. Its information is immediately available for processing. – To be executed, computer programs must be in memory. – The memory unit retains information until it can be sent to output devices. – Often, the memory unit is called either memory or primary memory. – Random-access memory (RAM) is an example of primary memory. – Primary memory is usually volatile, which means that it is erased when the machine is powered off.  2009 Pearson Education, Inc. All rights reserved. 7 Computer Components ■ Central processing unit (CPU): The CPU supervises the operation of the other sections. ■ Arithmetic and logic unit (ALU): The ALU (a part of the CPU) performs calculations and makes decisions. ■ Secondary storage unit: This unit is the “warehousing” section of the computer. – Devices such as hard drives, CD-ROM drives, DVD drives, and USB memory sticks are secondary storage units. – These normally hold programs or data that other units are not actively being used. – The computer can retrieve this information when it is needed later in time. Secondary storage is nonvolatile. – Information in secondary storage takes much longer to access than information in primary memory.  2009 Pearson Education, Inc. All rights reserved. 8 Machine, Assembly and High-Level Languages ■ Programmers write instructions in programming languages. Some of these are directly understandable by computers, and others require intermediate translation steps. ■ Computer languages that are in use today can be divided into three general types: – machine languages – assembly languages – high-level languages  2009 Pearson Education, Inc. All rights reserved. 9 Machine, Assembly and High-Level Languages ■ A computer can directly understand only its own machine language. ■ As the “natural language” of a particular computer, machine language is defined by the computer’s hardware design. Machine languages are machine dependent. ■ Machine languages generally consist of streams of numbers (ultimately reduced to 1s and 0s in the binary number system).  2009 Pearson Education, Inc. All rights reserved. 10 Machine, Assembly and High-Level Languages ■ The following section of a machine-language program demonstrates the incomprehensibility of machine language to humans: +1300042774 +1400593419 +1200274027 ■ Machine-language programming proved to be slow and error prone. [...]... All rights reserved 15 Visual Basic ■ In the late 1980s and the early 1990s, Microsoft developed the Microsoft Windows® graphical user interface (GUI) ■ Visual Basic was introduced by Microsoft in 1991 to make programming Windows applications easier © 2009 Pearson Education, Inc All rights reserved 16 Visual Basic ■ Visual Basic is a so-called object-oriented, event-driven visual programming language... overTimePay ■ Visual Basic is one of the world’s most popular high-level programming languages © 2009 Pearson Education, Inc All rights reserved 14 Visual Basic ■ Visual Basic evolved from BASIC (Beginner’s All-purpose Symbolic Instruction Code), which was developed as a language for writing simple programs quickly and easily ■ When Bill Gates founded Microsoft Corporation in the 1970s, he implemented BASIC. .. Environment (IDE) ■ The latest versions of Visual Basic are fully object oriented and respond to user-initiated events such as mouse clicks, keystrokes and timers ■ In Visual Studio, it is convenient to make programs by dragging and dropping predefined objects like buttons and textboxes © 2009 Pearson Education, Inc All rights reserved 17 Visual Basic ■ Microsoft introduced its NET strategy in 2000... Education, Inc All rights reserved 33 Examples of Programming Languages ■ C: fast, efficient code ■ Java: platform independence ■ BASIC: ease of use ■ Visual Basic: user interface design using forms ■ Perl: text manipulation © 2009 Pearson Education, Inc All rights reserved 34 Visual Basic. NET syntax If x>5 Then MessageBox.Show("I am greater than 5.") Else MessageBox.Show ("I am not greater than 5.") End... communicate among the world’s computers This is the focus of Microsoft s NET strategy ■ The Internet and the World Wide Web: – make information instantly and conveniently accessible, – and allow individuals and small businesses to achieve worldwide exposure © 2009 Pearson Education, Inc All rights reserved 28 Introduction to Microsoft NET ■ In June 2000, Microsoft announced its NET initiative – The NET initiative... in any NET-compatible language – Part of the initiative includes Microsoft s ASP.NET ■ The NET strategy extends the idea of software reuse to the Internet ■ Visual programming enables NET programmers to create applications using prepackaged graphical components © 2009 Pearson Education, Inc All rights reserved 29 NET Framework ■ The Microsoft NET Framework: – executes applications and web services... build large-scale enterprise applications, to enhance the functionality of web servers, and to provide applications for consumer devices ■ In 2000, Microsoft announced C# The C# programming language was designed specifically for the NET platform Like Visual Basic, C# is object oriented and has access to NET’s library © 2009 Pearson Education, Inc All rights reserved 21 Object Technology ■ Object technology... Pearson Education, Inc All rights reserved 23 Object Technology ■ Instead of worrying about the details of how objects are implemented, you can focus on the behaviors and interactions of objects ■ Visual Basic is one of the world’s most widely used object-oriented languages © 2009 Pearson Education, Inc All rights reserved 24 The Internet and the World Wide Web ■ In the late 1960s, ARPA rolled out... am not greater than 5."); } © 2009 Pearson Education, Inc All rights reserved 36 Learning a Programming Language ■ Syntax ■ Structure ■ Rules ■ Punctuation ■ Reserved Words (keywords) eg If, Else ■ Visual Basic. NET is NOT case sensitive MyCase is the same as myCase and MYCASE ■ Comment lines start with an apostrophe (') © 2009 Pearson Education, Inc All rights reserved ...11 Machine, Assembly and High-Level Languages ■ Programmers began using English-like abbreviations to represent the computer’s basic operations ■ These abbreviations formed the basis of assembly languages LOAD ADD STORE BASEPAY OVERPAY GROSSPAY © 2009 Pearson Education, Inc All rights reserved 12 Machine, Assembly and High-Level . Microsoft Visual Basic 2010: Reloaded Fourth Edition Chapter One An Introduction to Visual Basic 2010  2009 Pearson Education, Inc. All rights. overTimePay ■ Visual Basic is one of the world’s most popular high-level programming languages.  2009 Pearson Education, Inc. All rights reserved. 14 Visual Basic ■ Visual Basic evolved from BASIC. Languages ■ Visual Basic & Other High-Level Languages ■ Object Technology ■ The Internet and the World Wide Web ■ Introduction to Microsoft .NET ■ Language and Syntax ■ Visual Studio 2010 IDE ■ Solutions