As webmaster you always have to care about the format of the data types in your form field, and make sure to submit the right format of data type to the web server. By using this control you will be able to: -Synchronise your page control with XML file and control your controls data type and error messages from outside your project, without touching your code. -Produce more readable and manageable code -Produce maintainable product -Set background color of the control when there is an issue. The InputValidation control will collect all the error messages and put them in a tidy list. The list can be either shown on the web page or with a popup box.