1 <?xml version="1.0" encoding="utf-8"?>

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     7     Nokia Corporation - initial contribution.

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    10 <!DOCTYPE concept

    11   PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

    12 <concept id="GUID-1BB546C1-2795-55D9-97B6-AC3F6AB79389" xml:lang="en"><title>Controls</title><prolog><metadata><keywords/></metadata></prolog><conbody>

    13 <p>In the Symbian platform UI Control Framework, all UI elements (with a few

    14 exceptions) are <keyword>controls</keyword>. A control is a rectangular area

    15 of the screen that may respond to user input events. Buttons, menus, text

    16 input boxes and application views displaying application-specific data are

    17 all examples of controls. </p>

    18 <p>All controls are implemented by deriving from the <codeph>CCoeControl</codeph> class.

    19 Concrete implementations of controls are provided by a user interface library,

    20 or by the application programmer. The control framework itself provides no

    21 concrete controls. </p>

    22 </conbody></concept>