How to Create extender controls with the Ajax control toolkit
Microsoft ASP.NET is a free technology that allows programmers to create dynamic web applications. ASP.NET can be used to create anything from small, personal websites through to large, enterprise-class web applications. All you need to get started with ASP.NET is the free .NET Framework and the free Visual Web Developer. You'll learn how to create extender controls with the Ajax control toolkit utilizing the ASP.NET Ajax extensions.