How to Building ASP.NET AJAX Controls
Mike Ormond's Blog
Building ASP.NET AJAX Controls Index Post
http://blogs.msdn.com/mikeormond/archive/2008/03/28/building-asp-net-ajax-controls-index-post.aspx
Building ASP.NET AJAX Controls (Pt 1)
Building ASP.NET AJAX Controls (Pt 2 - Components)
Building ASP.NET AJAX Controls (Pt 3 - Properties and Events)
Building ASP.NET AJAX Controls (Pt 4 - Hold on, aren't you forgetting some things?)
Building ASP.NET AJAX Controls (Pt 5 - The bits I didn't get to in the last post)
Building ASP.NET AJAX Controls (Pt 6 - Moving things to the server)
Building ASP.NET AJAX Controls (Pt 7 - Server control implementation)
Building ASP.NET AJAX Controls (Pt 8 - Embedding Resources)
Building ASP.NET AJAX Controls - Further Reading
Building ASP.NET AJAX Controls Index Post
http://blogs.msdn.com/mikeormond/archive/2008/03/28/building-asp-net-ajax-controls-index-post.aspx