[How Do I:] Build a Custom ASP.NET AJAX Server Control?
by Chris Pels
Learn how to create a custom Web server control with ASP.NET AJAX functionality using the AJAX extensions in the Microsoft AJAX Library. This video walks you through both the server-side .NET code and the client-side JavaScript code, and provides an explanation of the 'prototype' concept. The custom ASP.NET AJAX control can then be used in an .aspx page like any other server control.