You can download the free edition, Visual Web Developer 2005 Express, from the
Microsoft Developer Network (http://msdn.microsoft.com/vstudio/express/vwd). From
this page, you can also navigate to the downloads for the other Express editions, including
ones for C#, VB .NET, Visual J#, and C++ development.
You can use any edition of Visual Studio 2005, including Standard, Professional, or
one of the flavors of Team Edition, to build and run the samples included in this book.
If you are following along with the figures in this book, you??™ll see they have been
captured on a development system that uses the Visual Studio 2005 Team Edition for
Software Developers.
Seeing a Simple Example in Action
Understanding how this technology all fits together is best shown using a simple example.
In this case, suppose you have a client application that uses JavaScript and an
XMLHttpRequest object to issue a server request to perform the simple addition of two
integers. As the user types the values into the text boxes on the client, the page calls the
server to have it add the two values and return a result, which it displays in a third text
box.
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