Professional visual basic 2012 and NET 4 5 programming

CONTENTS Specifying the Desired Degree of Parallelism 786 ParallelOptions 786 System.Threading.Tasks.Task 790 Summary 813 CHAPTER 20: DEPLOYING XAML APPLICATIONS VIA A New Deployment Op

PROFESSIONAL VISUAL BASIC® 2012

AND NET 4.5 PROGRAMMING

INTRODUCTION xxxi

 PART I LANGUAGE CONSTRUCTS AND ENVIRONMENT CHAPTER 1 Visual Studio 2012 3

CHAPTER 2 The Common Language Runtime 57

CHAPTER 3 Objects and Visual Basic 103

CHAPTER 4 Custom Objects 179

CHAPTER 5 Advanced Language Constructs 237

CHAPTER 6 Exception Handling and Debugging 263

 PART II BUSINESS OBJECTS AND DATA ACCESS CHAPTER 7 Arrays, Collections, and Generics 281

CHAPTER 8 Using XML with Visual Basic 315

CHAPTER 9 ADO.NET and LINQ 369

CHAPTER 10 Data Access with the Entity Framework 407

CHAPTER 11 Services (XML/WCF) 429

 PART III SPECIALIZED TOPICS AND LIBRARIES CHAPTER 12 XAML Essentials 465

CHAPTER 13 Creating XAML Applications for Windows 8 517

CHAPTER 14 Applications with ASP.NET, MVC, JavaScript, and HTML 561

CHAPTER 15 Localization 645

CHAPTER 16 Application Services 667

CHAPTER 17 Assemblies and Refl ection 693

CHAPTER 18 Security in the NET Framework 719

CHAPTER 19 Parallel Programming Using Tasks and Threads 757

CHAPTER 20 Deploying XAML Applications via the Windows 8 Windows Store 815

INDEX 833

PROFESSIONAL Visual Basic® 2012 and NET 4.5

Programming

PROFESSIONAL Visual Basic® 2012 and NET 4.5

Programming

Bill Sheldon Billy Hollis Rob Windsor David McCarter Gastón C Hillar Todd Herman

Professional Visual Basic® 2012 and NET 4.5 Programming

Copyright © 2013 by John Wiley & Sons, Inc., Indianapolis, Indiana

Published simultaneously in Canada

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are trademarks or registered trademarks of John Wiley & Sons, Inc and/or its affi liates, in the United States and

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with any product or vendor mentioned in this book.

This book is dedicated to Tracie, Billy, and Johnny, who had to put up with me locking myself away in my home offi ce and not spending as much time with them as I'd like and they deserved

—Bill Sheldon

I’d like to dedicate this book to those in the software development community who put users fi rst I’ve watched with regret as our profession has become inwardly focused, worrying far more about technology and process than what we can accomplish for our users and the businesses for which they work I salute those who invest the time and effort to deliver compelling and wonderful experiences to their users, and I hope the material I contributed to this book will help them do that

For my wife, Amy Thank you for your support while I worked

on this project I must also thank my son, Aidan, and daughter, Alaina, for their support and understanding while I was busy in

my offi ce rather than spending time with them I love all of you

Thank you

—Todd Herman

ABOUT THE AUTHORS

BILL SHELDON is a software architect and engineer, originally from Baltimore, Maryland Holding

a degree in computer science from the Illinois Institute of Technology (IIT), Bill has worked in the

IT industry since resigning his commission with the United States Navy He is the Vice President of Information Technology for Rubio’s Restaurants (www.rubios.com) and has eight years as a Microsoft MVP for Visual Basic Bill lives in Oceanside, California, with his wife and two sons Bill is an avid cyclist and is active in the fi ght against diabetes You can track Bill down via Twitter: @NerdNotes

BILLY HOLLIS is a developer and user-experience designer based in Nashville, Tennessee His consulting company, Next Version Systems, offers design and development on software applications requiring innovative and intuitive user experiences He speaks regularly at major industry confer-ences, usually on design concepts and user experience technologies He is also available for training

in XAML technologies and in user experience design concepts

ROB WINDSOR is a Lead SharePoint Consultant with Portal Solutions—a Microsoft Gold Partner based in Washington, D.C., and Boston He has 20 years’ experience developing rich-client and web applications with Delphi, VB, C#, and VB.NET, and is currently spending a majority of his time working with SharePoint Rob is a regular speaker at conferences, code camps, and user groups across North America and Europe He regularly contributes articles and videos to MSDN, TechNet,

and the Pluralsight On-Demand library, and is the coauthor of Professional Visual Basic 2010 and NET 4 Rob is the founder and past president of the North Toronto NET User Group and has been

recognized as a Microsoft Most Valuable Professional for his involvement in the developer community You can follow Rob on Twitter at @robwindsor

DAVID MCCARTER is a Microsoft MVP and a principal software engineer/architect in San Diego

He is the editor-in-chief of dotNetTips.com, a website dedicated to helping programmers in all aspects of programming David has written for programming magazines and has published four

books, the latest of which is David McCarter’s NET Coding Standards, and is available at:

http://codingstandards.notlong.com He is one of the founders and directors of the old San Diego NET Developers Group (www.sddotnetdg.org) In 2008 David won the INETA Community Excellence Award for his involvement in the NET community David is also an inventor of a software printing system that was approved by the U.S Patent Offi ce in May 2008

18-year-GASTÓN C HILLAR is an Italian living in Argentina He has been working with computers since he

was eight years old He began programming with the legendary Texas TI-99/4A and Commodore 64

home computers in the early ’80s He has worked as developer, architect, project manager, and IT

consultant for many companies around the world He is always looking for new adventures around

the world Gastón has written four books in English, contributed chapters to three other books, and

has written more than 40 books in Spanish He contributes to Dr Dobbs at http://drdobbs.com,

and is a guest blogger for Intel Software Network at http://software.intel.com In 2009, 2010,

2011, and 2012, he received the Intel® Black Belt Software Developer award In 2011, he received

the Microsoft MVP on Technical Computing award

Gastón lives in Argentina with his wife, Vanesa, and his son, Kevin When not tinkering with

computers, he enjoys developing and playing with wireless virtual reality devices and electronic toys

with his father, his son, and his nephew Nico You can reach him at gastonhillar@hotmail

.com You can follow him on Twitter at http://twitter.com/gastonhillar Gastón’s blog is at

http://csharpmulticore.blogspot.com

TODD HERMAN works for APX Labs as a senior software engineer His current focus is developing a

robust library to support the XMPP standard He has been programming since he received his fi rst

computer, a Commodore 64, on his 11th birthday His experience ranges from developing data entry

software in FoxPro for a water research laboratory, to writing biometric applications in Visual Basic

for NEC He lives in Virginia with his wife and children, spending his free time programming,

playing computer games, and watching the SyFy Channel or reruns of Firefl y.

ABOUT THE TECHNICAL EDITORS

DOUG WATERFIELD has been a software developer and architect for over 20 years and has been working with NET languages and related technologies since their fi rst release He has designed and constructed solutions for Fortune 500 and Defense Department clients through Chameleon Consulting, and he is a Senior Software Engineer with Interactive Intelligence, Inc Doug graduated from Rose-Hulman Institute of Technology in 1988 and recently earned PMP (Project Management Professional) certifi cation from PMI Doug and his family are very active in the Avon, Indiana, community through the Boy Scouts of America and other organizations He can be reached at

djw@iquest.net

DOUG PARSONS lives in Northeast Ohio and has been developing software professionally for over

15 years He has a diverse background, having worked in the political, fi nancial, medical, and manufacturing sectors over the course of his career He is currently employed as a Senior NET Developer with Harley-Davidson Motor Company In his free time he tinkers with his various motorcycles, sits on the advisory committee of a High School Technology program, and spends time with his family

Mary Beth Wakefi eld

FREELANCER EDITORIAL MANAGER

MANY THANKS TO ALL OF THE PEOPLE associated with getting this book together and out the door More so than any other edition, there seemed to be a real struggle as we made some truly major changes to much of the content Thanks to those who stepped up and met the challenges that we were presented with during the production cycle

—Bill Sheldon

THANKS TO BETH MASSI for being too busy to work on this project and thanks to the people at Wrox for accepting Beth’s suggestion that I would be a suitable replacement I’d also like to thank those who helped me advance professionally to the point that this opportunity was even possible:

Craig Flanagan, Sasha Krsmanovic, Jean-Rene Roy, Mark Dunn, Carl Franklin, Richard Campbell, Barry Gervin, Dave Lloyd, Bruce Johnson, Donald Belcham, and everyone at Portal Solutions

—Rob Windsor

INTRODUCTION xxxi

PART I: LANGUAGE CONSTRUCTS AND ENVIRONMENT

Summary 56

CONTENTS

Types 61Modules 62Assemblies 63

My.Application 94My.Computer 97My.Resources 99My.User 99

ParamArray 132

Summary 235

CONTENTS

Summary 278 PART II: BUSINESS OBJECTS AND DATA ACCESS

Arrays 282

Summary 368

DataTableCollection 395DataRelationCollection 395ExtendedProperties 396

Advanced ADO.NET Features of the DataSet and DataTable Objects 399

Working with the Common Provider Model 401

Summary 406

Summary 426

Namespaces 455

Looking at WSDL and the Schema for HelloCustomerService 459

Summary 461

CONTENTS

PART III: SPECIALIZED TOPICS AND LIBRARIES

Property Setting: Attribute Syntax vs Element Syntax 470

Panels 472

Brushes 486

DataContext 492

ItemControls 501

CONTENTS

Old Elements Replaced by Functional Equivalents in Windows 8 519

AppBar 524

Pickers 542ProgressRing 543ToggleSwitch 544

Changes to the Visual Designer in Visual Studio 2012 547

StandardStyles.xaml 555Online Documentation for Grid App and Split App Templates 556

Summary 560

CHAPTER 14: APPLICATIONS WITH ASP.NET, MVC,

Building Windows 8 Style Apps with HTML and JavaScript 638 Summary 644

Summary 665

CONTENTS

Creating a Windows Service in Visual Basic 675

CONTENTS

Summary 716

The System.Security.Permissions Namespace 723

Defi ning Your Application UAC Settings 735

PKCS 747

Summary 754

CHAPTER 19: PARALLEL PROGRAMMING USING

CONTENTS

Specifying the Desired Degree of Parallelism 786

ParallelOptions 786

System.Threading.Tasks.Task 790

Summary 813

CHAPTER 20: DEPLOYING XAML APPLICATIONS VIA

A New Deployment Option for Windows 8 Apps 815

Getting an Account at the Windows Store 817

Requirements for Apps in the Windows Store 821

Working with the Windows Store in Visual Studio 2012 823

Side-loading for LOB Apps in an Organization 828

Summary 831

INDEX 833

WELCOME TO THE NEXT ERA in NET development .NET has moved from a set of focused tools and a runtime environment to the core of the latest Microsoft operating system In

developer-2002, Microsoft released NET and introduced developers to a new paradigm for building tions For Visual Basic it was not only a new environment, but really a new language

applica-Visual Basic NET (as it was initially called) went beyond an overhaul .NET changed core elements of the syntax affecting every aspect of development with Visual Basic The entire runtime model shifted

to a new common language runtime (CLR) environment and the language went from object-based to object-oriented Although most people didn’t recognize it, we were moving to a new language

Now with the introduction of Windows RT, Microsoft has again shifted the paradigm Not so much

at the language level, but as it relates to how user interfaces are developed and work The original runtime environment, although enhanced for NET 4.5, risks being fl agged as being on the path to that fatal “legacy” designator Windows 8 introduces the concept of Windows Store applications, which are built on a version of the CLR that has different features, and that’s important Because while client applications may view the core CLR as legacy, server-based applications have probably never been in a position to leverage it more

This book provides details about not only the latest version of Visual Basic and the new NET Framework 4.5 More important, it carries this coverage to a new platform, Windows RT, and a new class of Windows Store applications As a result the contents of this book have been turned upside down This book doesn’t just indicate that there are new Windows Store applications, but focuses in directly on how to build and deploy this new class of applications The result is a very dif-ferent book from the previous edition

If you compare this edition to an older edition you’ll immediately realize that this edition is visibly smaller Just as you saw Visual Basic evolve nearly 10 years ago, NET is going through an evolu-tion of its own The result was a need to refocus on what this book covers This has resulted in a sea change with regard to where to focus coverage for Visual Basic

The most noticeable omission from the book is in fact the original smart client development model—Windows Forms When Microsoft introduced WPF it informally announced that the era of Windows Forms was ending It has taken some time, and certainly support will continue for many more years, but the reality is that the evolution of Windows Forms is complete The information around Windows Forms provided in past editions of this book is essentially complete While one or two of the chapters do still reference Windows Forms in their samples, by and large the book has moved beyond the use of this technology

The result was that Billy Hollis, who has a passion for user interface design, agreed to take

on the rather signifi cant task of re-imagining how to approach user interface design in a world that includes Windows RT The new XAML-based interface design chapters are completely redone from the ground up and focused on teaching developers how to approach XAML development from the ground up The last version of the book approached the user interface model from Windows Forms

and transitioning to XAML However, in this version the approach takes on XAML as the primary

user interface development model As such these chapters address Windows Store application

development head-on, not as an afterthought

However, Windows Forms wasn’t alone in being moved into the past We’ve eliminated several

appen-dices, Microsoft Offi ce (both VSTO and SharePoint) integration, and references to classic COM Some,

for example, development around Microsoft Offi ce, is facing its own set of changes as Microsoft Offi ce

prepares to evolve Others, such as classic COM and Windows Forms, are no longer technologies that

developers should be targeting We also found ourselves needing to change out how we addressed

larger topics such as ASP.NET and Silverlight The result is that this book is much more focused on

building applications using Visual Basic that target Microsoft’s core next generation of technologies

THE FUTURE OF VISUAL BASIC

Early in the adoption cycle of NET, Microsoft’s new language, C#, got the lion’s share of

atten-tion However, as NET adoption has increased, Visual Basic’s continuing importance has also been

apparent Microsoft has publicly stated that it considers Visual Basic to be the language of choice for

applications for which developer productivity is one of the highest priorities

In the past, it was common for Microsoft and others to “target” different development styles; with

Visual Studio 2010, Microsoft announced that VB and C# will follow a process of coevolution As

new language features are developed, they will be introduced to both Visual Basic and C# at the

same time This release is the fi rst step in that process, although it’s not complete at this time

Coevolution does not mean that the languages will look the same, but rather that they will support

the same capabilities For example, Visual Basic has XML literals, but that doesn't mean C# will

get exactly the same functionality, as C# has the capability to work with XML through the existing

framework classes The old process of fi rst introducing a feature in Visual Basic and then in the next

release having C# catch up, and vice versa, is over As new capabilities and features are introduced,

they are being introduced to both Visual Basic and C# at the same time

This leads to a discussion of the “Roslyn” compiler implementation It seems like almost fi ve years

ago that the fi rst whispers of a new 64-bit Visual Basic compiler implemented with Visual Basic

started Considered the standard for a serious language, implementing a language compiler in the

language it compiles has become something of a standard

However, over time this project evolved Microsoft, seeing commonalities across the C# and Visual

Basic compilation projects, realized that once the core syntax had been consumed the remainder of

the compilation process was common across languages While each implementation language needed

a custom solution to handle parsing and interpreting the raw “code,” once that code had been

con-verted to Intermediate Language (IL) the remaining compiler steps were essentially the same

Suddenly a new concept—the compiler as a service—was created Code-named Roslyn, this is

the future for both Visual Basic and C# compilation Roslyn takes the traditional compiler as a

“black-box” and provides an interface that for interacting with the creation of NET assemblies

Introducing an API that exposes your components during the compilation process is a powerful

tool Roslyn has been in a technology preview model since well before the release of Visual Studio

2012 was designed so that those people who move to the latest tools are limited when working with

a team that hasn’t fully migrated to that new version

More important, Visual Studio 2012 comes with a promise of updates It’ll be interesting to see how this plays out over the coming months, but the Visual Studio team has indicated that they will be releasing regular updates to Visual Studio Update 1 has already been announced as this book goes

to print, and the team has indicated that they would like to continue with updates on a quarterly basis This goes beyond what we’ve seen in the past, with Power Pack style updates that occurred out

of the standard release cycle Instead we see that Microsoft is committing to keeping Visual Studio

on the cutting edge of evolving technology As the environments we developers need to support change, we can expect that Visual Studio will be adapting and incrementally improving to help us.While these changes may not involve changes to the core of the NET framework, we can expect NET

to remain the most productive environment for custom applications One of the most important tages of the NET Framework is that it enables applications to be written with dramatically less code then other alternatives Originally this was in comparison to older technologies, but today the compari-son is as opposed to writing native solutions that support the many different platforms and operating systems you need to support In the world of business applications, the goal is to concentrate on writing business logic and to eliminate routine coding tasks as much as possible In other words, of greatest value in this new paradigm is writing robust, useful applications without churning out a lot of code.Visual Basic is an excellent fi t for this type of development, which makes up the bulk of software development in today’s economy Moreover, it will grow to be an even better fi t as it is refi ned and evolves for exactly that purpose

advan-WHO THIS BOOK IS FOR

This book was written to help experienced developers learn Visual Basic For those who are just starting the transition from other languages or earlier versions to those who have used Visual Basic for a while and need to gain a deeper understanding, this book provides information on the most common programming tasks and concepts you need

Professional Visual Basic 2012 and NET 4.5 Programming offers a wide-ranging presentation of

Visual Basic concepts, but the NET Framework is so large and comprehensive that no single book can cover it all The focus in this book is providing a working knowledge of key technologies that are important to Visual Basic developers It provides adequate knowledge for a developer to work across both Windows Store applications through WCF services This book is meant to provide a breadth of knowledge about how to leverage Visual Basic when developing applications For certain specifi c technologies, developers may choose to add to their knowledge by following this book with

a book dedicated entirely to a single technology area

WHAT THIS BOOK COVERS

This book covers Visual Basic from start to fi nish It starts by introducing Visual Studio 2010

As the tool you’ll use to work with Visual Basic, understanding Visual Studio’s core capabilities

is key to your success and enjoyment with building NET applications In these pages, you have

the opportunity to learn everything from database access, Language Integrated Queries (LINQ),

and the Entity Framework, to integration with other technologies such as WPF, WCF, and

service-based solutions Along with investigating new features in detail, you’ll see that Visual Basic 10 has

emerged as a powerful yet easy-to-use language that enables you to target the Internet just as easily

as the desktop This book covers the NET Framework 4

HOW THIS BOOK IS STRUCTURED

Part I, “Language Constructs and Environment”—The fi rst six chapters of the book focus on core

language elements and development tools used by Visual Basic developers This section introduces

Visual Studio 2012, objects, syntax, and debugging

Visual Basic This chapter looks at the Visual Studio development environment Introducing

a simple WPF application project and reviewing key capabilities like the debugger, this

chap-ter will help you to prepare for and become comfortable with this powerful environment

.NET platform: the common language runtime (CLR) The CLR is responsible for

manag-ing the execution of code compiled for the NET platform, as well as on the Windows RT

platform This chapter introduces you to how the different versions of the CLR are in fact

closer to different operating systems than to a common environment You’ll learn about

versioning and deployment, memory management, cross-language integration, metadata,

and the IL Disassembler The chapter also introduces namespaces and their

hierarchi-cal structure An explanation of namespaces and some common examples are provided

In addition, you learn about custom namespaces, and how to import and alias existing

namespaces within projects This chapter also looks at the My namespace available in

Visual Basic

object-oriented programming in Visual Basic This chapter introduces the basics of objects, types,

type conversion, reference types, and the key syntax which make up the core of Visual Basic

they fi t within Visual Basic Starting with inheritance, you create simple and abstract classes

and learn how to create base classes from which other classes can be derived This chapter

puts the theory of object-oriented development into practice The four defi ning

object-ori-ented concepts (abstraction, encapsulation, polymorphism, inheritance) are described, and

you will learn how these concepts can be applied in design and development to create

effec-tive object-oriented applications

advanced language concepts such as lambda expressions, the new Async keyword, and Iterators Each of these provides key capabilities that are new to Visual Basic 2012, and this new chapter provides details on how you can leverage these new language constructs

and debugging work in Visual Basic by discussing the CLR exception handler and the Try

Catch Finally structure Also covered are error and trace logging, and how you can use these methods to obtain feedback about how your program is working

Part II, “Business Objects and Data Access”—The next fi ve chapters, Chapter 7 through Chapter

11, look at common structures used to contain and access data This includes framework elements such as arrays and collections, XML, database access, and Windows Communication Foundation (WCF) services These chapters focus on gathering data for use within your applications

collections as a baseline for having a set of related items It then expands on these basic tures by exploring generics Introduced with version 2.0 of the NET Framework, generics enable strongly typed collections

.NET Framework that facilitate the generation and manipulation of XML We describe the NET Framework’s XML-related namespaces, and a subset of the classes exposed by these namespaces is examined in detail

the ADO.NET object model in order to build fl exible, fast, and scalable data-access objects and applications The evolution of ADO into ADO.NET is explored, and the main objects in ADO.NET that you need to understand in order to build data access into your NET appli-cations are explained Additionally, this chapter delves into LINQ to SQL LINQ offers the capability to easily access underlying data—basically a layer on top of ADO.NET Microsoft has provided LINQ as a lightweight façade that provides a strongly typed interface to the underlying data stores

implementation of an Entity Relationship Modeling (ERM) tool Using EF, developers can generate classes to represent the data structures that are defi ned within SQL Server, and leverage these objects within their applications

components that allow for standards-based communications over a number of protocols

WCF is Microsoft’s answer for component communications within and outside of the enterprise

Part III, “Specialized Topics and Libraries”—Chapters 12 through Chapter 14 focus on creating

client applications These chapters address Windows Store applications, which are exclusive to the Windows RT CLR In parallel it discusses building applications for WPF that are compatible with earlier versions of Windows and which represent the majority of corporate applications Chapter 14

moves to looking at web-based applications and interfaces Chapters 15 through 20 then focus on

topics such as localization, windows services, security, multi-threaded applications, and deployment

associated with the Windows Presentation Foundation With the transition to Windows Store

applications, XAML is still applicable, although it behaves slightly differently This

chap-ter introduces you to building applications focused on the XAML model of user inchap-terface

declaration

into the specifi cs around building Windows Store applications The chapter looks at

spe-cifi c conventions around Windows 8 user interfaces, new features spespe-cifi c to Windows 8,

and leveraging the visual designer that is part of Visual Studio 2012 This chapter gets into

the nuts-and-bolts steps for handling things like Live Tiles and contracts for Windows 8

integration

goes through web-based application development It covers examples of everything from

ASP.NET with AJAX and CSS to MVC (Model-View-Controller) applications

con-sider when building your applications for worldwide use It looks closely at the System.

Globalization namespace and everything it offers your applications

production of Windows Services The creation, installation, running, and debugging of

Windows Services are covered

within the CLR The structure of an assembly, what it contains, and the information it

con-tains are described In addition, you will look at the manifest of the assembly and its role in

deployment, and how to use remoting

.Security.Permissions namespace including how it relates to managing permissions You

also look at the System.Security.Cryptography namespace and run through some code

that demonstrates its capabilities

threading and explains how the various objects in the NET Framework enable any of its

consumers to develop multithreaded applications You will learn how threads can be created,

how they relate to processes, and the differences between multitasking and multithreading

chapter takes a close look at using the Windows Store to deploy applications You will see

the new Windows 8 deployment options and how to set up an account with the Windows

Store for deploying your applications It also looks at how enterprise developers will deploy

custom internal line-of-business applications on Windows 8

WHAT YOU NEED TO USE THIS BOOK

Although it is possible to create Visual Basic applications using the command-line tools contained in the NET Framework, you’ll want Visual Studio 2012, which includes the NET Framework 4.5, to get the most out of this book In addition, note the following:

‰ You’ll need NET Framework 4.5, which is installed with whatever version of Visual Studio

Several chapters make use of Internet Information Services (IIS) IIS is part of every operating system released by Microsoft since Windows XP, but on newer operating systems you’ll need to run

as administrator to develop against it Alternatively, you can leverage the development server that ships with Visual Studio 2012

The source code for the samples is available for download from the Wrox website at:

As for styles in the text:

‰ We italicize new terms and important words when we introduce them.

‰ We show keyboard strokes like this: Ctrl+A

‰ We show fi lenames, URLs, and code within the text like so: persistence.properties

‰ We present code in two different ways:

We use a monofont type with no highlighting for most code examples.

We use bold to emphasize code that is particularly important in the present

context or to show changes from a previous code snippet.

SOURCE CODE

As you work through the examples in this book, you may choose either to type in all the code

manually, or to use the source code fi les that accompany the book All the source code used in this

book is available for download at www.wrox.com. Specifi cally for this book, the code download is

on the Download Code tab at:

www.wrox.com/remtitle.cgi?isbn=9781118314456

You can also search for the book at www.wrox.com by ISBN (the ISBN for this book is

978-1-118-31445-6) to fi nd the code And a complete list of code downloads for all current Wrox

books is available at www.wrox.com/dynamic/books/download.aspx.

At the beginning of each chapter that contains downloadable code, we’ve provided a reminder of

the link you can use to fi nd the code fi les Throughout the chapter, you’ll also fi nd references to the

names of code fi les in the listing titles or the text

Most of the code on www.wrox.com is compressed in a ZIP, RAR archive, or similar archive

format appropriate to the platform Once you download the code, just decompress it with an

appro-priate compression tool

NOTE Because many books have similar titles, you may fi nd it easiest to search

by ISBN; this book’s ISBN is 978-1-118-31445-6.

Once you download the code, just decompress it with your favorite compression tool Alternately,

you can go to the main Wrox code download page at www.wrox.com/dynamic/books/download

.aspx to see the code available for this book and all other Wrox books

ERRATA

We make every effort to ensure that there are no errors in the text or in the code However, no one

is perfect, and mistakes do occur If you fi nd an error in one of our books, like a spelling mistake or

a faulty piece of code, we would be very grateful for your feedback By sending in errata, you may

save another reader hours of frustration, and at the same time, you will be helping us provide even

higher-quality information