说明：  It is possible to create very nice web pages and you can even change the look of some form controls using CSS (for example, it is possible to change the look of textboxes and buttons), but there is no way to change the look of checkboxes and radio buttons. This article describes two custom controls with the same functionality as standard ASP.NET CheckBox and RadioButton and with properties that allow you to change the design of the controls using images. Another way of how to use controls like these is when you want to place an icon with checkbox functionality on your web page for example, I wanted to mark some data as hidden, so I used checkbox control with lock and stricken lock icons