For the last few weeks I have been writing articles and creating videos about how to create custom web server control. Here is the list of resources.

Articles:

1) Creating a RequiredTextBox Web Server Control in ASP.NET
2) Injecting Client Side Scripts for RequiredTextBox Control
3) Attaching an ICON with the RequiredTextBox Control

Videos:

1) Building RequiredTextBox Custom Server Control
2) Custom RequiredTextBox With RegularExpressionValidator
3) Injecting Client Script For RequiredTextBox Control
4) Building RequiredTextBox Embedding WebResource
5) Creating ICON for RequiredTextBox Control

Enjoy the resources!