In the Symbian platform UI Control Framework, all UI elements (with a few exceptions) are controls . A control is a rectangular area of the screen that may respond to user input events. Buttons, menus, text input boxes and application views displaying application-specific data are all examples of controls.
All controls are implemented by deriving from the CCoeControl class. Concrete implementations of controls are provided by a user interface library, or by the application programmer. The control framework itself provides no concrete controls.
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