HTML Controls for ASP.NET Web Pages
The topics in this section describe how to work with ASP.NET Web server controls that appear on the HTML tab of the Visual Web Developer Toolbox.
By default, HTML elements on an ASP.NET Web page are not available to the server; they are treated as opaque text that is passed through to the browser. However, by converting HTML elements to HTML server controls, you expose them as elements you can program in server-based code.
For complete syntax information for Web server controls, see.