NGWS SDK Documentation  

This is preliminary documentation and subject to change.
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Extending Existing Controls

A new Web Forms control can be based on an existing control. You may want to add functionality to a control that is not quite right for your application. To extend an existing control, create a new control class that inherits from the existing control's class. You can then override the properties and methods of the base control class to change existing behavior. Add new functionality by adding new properties and methods to the new class.