The ASP.NET framework is made of up custom HTML and Server controls that are the building blocks for developing ASP.NET web applications.  Other technologies are highly utilized in the web development process, such as HTML, CSS, and JavaScript; however, for data-driven or server-based applications, the ASP.NET controls are the primary means to develop ASP.NET web sites.  These controls essentially render HTML, CSS, and JavaScript when represented on the client browser and the developer doesn't need to worry about how the rendering works.  His primary focus is using the server controls to their fullest.

You may have seen my other article on creating a custom provider.  This article will focus on creating user interface controls for that provider.  When developing a custom provider framework, it is wise to create a wide array of server controls to go along with them.  These server controls make use of the ASP.NET framework and server control architecture, but they also integrate with the custom provider and create almost maintenance-free server controls that work seamlessly with the provider.