Sams Teach Yourself More Visual Basic.NET in 21 Days, Third Edition, helps intermediate programmers gain the knowledge and skills to be able to design professional Windows applications and Web services. Programmers learn how to use their previous VB skills in this new environment. Topics covered include: the .NET Framework; Classes and how to work with them; review SQL and how to use it; application design process; create control objects that enhance applications; how to use Crystal Reports; error-handling, performance, testing, and debugging; how to get a product to market, and how to make use of XML in VB.NET.