Rob Cameron & Dale Michalk 
Building ASP.NET Server Controls [PDF ebook] 

This tutorial and reference will benefit you, the dedicated ASP.NET developer. If you understand the gains of object-oriented development, and want to apply those principles to ASP.NET and server control development, then this book will be your guide!In fact, this book is the most up-to-date text available on the market. Hot, new topics of discussion include mobile server control development (for supporting mobile phone web application development), and how to utilize the latest versions of Visual Studio .NET 2003 and the .NET Framework 1.1.