>Hi Eric,
>
>There are many forms in my web application, do you mean I have to redeploy all of the controls? Thanks.

The article I have written is for Windows apps. It won't work for web apps. If you find the trick for web apps, you will probably need to replace all your controls on every page. That's why many programmers are using inhereted controls. If they need to add a new behavior or feature, they don't need to change the reference on all pages.