Home > Articles > Web Services

Creating Web Services with Visual C++.NET

.NET represents a revolutionary change in the way we program, and its support for Web Services is one of the leading factors. Web Services are transforming the way data is accessed across network boundaries leading to rich information sharing for applications that harness this new technology.

See all Sams Teach Yourself on InformIT Programming Tutorials.

There are a few people who have already written Visual C++ .NET off as a language that is too difficult and archaic compared to the other .NET languages. They couldn’t be more wrong. Visual C++ .NET is a revolutionary step forward for one of the most widely used languages in the world, and this book will show you many of the features that make this new version more powerful than its counterparts.

My book "SAMS Teach Yourself Visual C++ .NET in 24 Hours" focuses on the new features of Visual C++ .NET rather than rehashing the features that have been present in previous versions of the compiler. In addition, I realize that many developers have legacy code that is just too valuable to rewrite, so this book details the steps you need to take to move those components into the .NET world. That’s not all. In order to show how valuable Visual C++ .NET is within the .NET Framework, you’ll learn 1 thing that sets this .NET language apart from the rest: the ability to mix native unmanaged code within a managed environment, something none of the other .NET languages can do.

When I wrote this book I was amazed at how many new features were added to Visual C++ .NET and equally amazed at how Microsoft updated some of the previous tried and true technologies such as MFC and ATL. My goal when writing this book was to teach you the "how" while still stressing the "why." Make no mistake, Visual C++ .NET is a powerful language that still has a long lifetime and an important role to play in this new world of software development we find ourselves in.

—Mark Schmidt

This chapter is from the book

One of the biggest reasons to use the .NET Framework to create applications in Visual C++ .NET over using MFC is the .NET Framework's support for Internet technologies. Even though MDC does provide support for various Internet-related tasks through the WinInet library and ISAPI classes, the .NET Framework expands on these and makes many more technologies available. The .NET Framework makes writing Web-based technology very easy with the provided classes. Web Services are especially well suited to Visual C++ .NET because you can do everything other .NET languages can do, and you can also wrap legacy code with .NET managed classes and make them Web Services for use in Web development. The only caveat to creating Web Services with Visual C++ .NET is that it tends to be more difficult than other .NET languages because C++ itself is a more difficult language to master.

In this hour, you will learn about the features included in the .NET Framework for writing Web Services with Visual C++ .NET. In this hour you will:

  • Review the Web Service support in the .NET Framework

  • Write a simple .NET Web Service

  • Use the new Web Service as part of an application

  • Debug and test the Web Service

Overview of Web Services and .NET

Web Services are ASP.NET programmable entities that provide particular functionality and are accessible to any other systems through the use of the Simple Object Access Protocol (SOAP), a technology that uses Internet standard XML and HTTP. Web Services are based on the XML standard and other Internet standards in order to provide an interface that is usable not only by other .NET applications but also applications written in other languages and on other platforms.

A Web Service can either be used internally by a single application or exposed to be used externally over the Internet. By using an XML-based protocol as the fundamental communication method, the technology gap between systems is eliminated. Developers can create applications that use many different Web Services together, similar to using objects together.

One of the main characteristics of a Web Service is its high level of abstraction. The implementation and usage of the Web Service is done through an XML-based protocol. Therefore, the client and server need only deal with that technology and understand the inputs, outputs, and location provided by the Web Service.

Understanding the Web Service Infrastructure

Web Services that reside on a Web server are addressed via URLs. Clients of Web Services can discover what Web Services are available, dynamically discover their interfaces, and then use the Web Services, all without being specifically programmed to work with those Web Services.

Essentially a Web Service has the same generic capabilities that a Web browser has with a Web site. The Web browser isn't developed to use a specific Web site, but when it is pointed to one, it knows how to adapt to the content and display it appropriately. A Web Service is similar in that the client does not have to be programmed to know everything about a Web Service. Instead, the client discovers the Web Service's interface and then uses it appropriately.

Web Services must be loosely coupled, use an open standard for communication, and use a universal data format. Rather than using a binary protocol to send and receive data, Web Services uses text-based XML, which in turn leads to several advantages. First of all, it is much easier to debug by reading XML than it is to parse through chunks of binary data. Secondly, by using standard technologies, namely HTTP and XML, third-party vendors can easily create their own implementations for different platforms. Web Services also use an infrastructure that provides a discovery mechanism, a service description to describe how the services should be used, and a standard format with which to communicate. Figure 11.1 shows a representation of the Web Service infrastructure.

Figure 11.1 Web Service infrastructure and communications.

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information

To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.


Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.


If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information

Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.


This site is not directed to children under the age of 13.


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information

If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.


Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information

Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents

California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure

Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact

Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice

We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020