HOW TO: Build a Templated Custom Control
Solution
Creating a Templated Control
by Rob Howard and Steven Smith (informIT)
Building Templated Custom ASP.NET Server Controls
by Scott Mitchell (MSDN)
In Depth ASP.NET using ADO.NET - Developing a Templated DataBound Control
by John Godel (DeveloperFusion.com)
Related Resources
ASP.NET QuickStart Tutorial: Developing a Templated Control
Book:
ASP.NET Developer's Cookbook
by Steven Smith and Rob Howard