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+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
+<!-- This component and the accompanying materials are made available under the terms of the License 
+"Eclipse Public License v1.0" which accompanies this distribution, 
+and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
+<!-- Initial Contributors:
+    Nokia Corporation - initial contribution.
+Contributors: 
+-->
+<!DOCTYPE concept
+  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
+<concept id="GUID-D7600D93-CFB8-565D-8200-7082B2CF1791" xml:lang="en"><title>User
+Interface Data MTM</title><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p>UI MTM libraries can be quite large, and often there are functions that
+Messaging applications need to access often and rapidly. To improve memory
+efficiency, these functions are split off into another DLL, called the UI
+Data MTM that can be easily kept in memory without the extra overhead of the
+UI MTM. </p>
+<section><title>UI Data MTM base class</title> <p>The base class for a UI
+Data MTM is <xref href="GUID-899C6D87-5712-34A7-902C-EA452894700C.dita"><apiname>CBaseMtmUiData</apiname></xref>. The implementation of UI Data
+MTMs is relatively simple, as they contain little more than functions to return
+the required icons and extra menu items. </p> <p>UI Data MTMs offer the following
+capabilities: </p> <ul>
+<li id="GUID-EF22528E-D4EA-57B4-84FC-BD8E44D742DA"><p> <b>Provide MTM-specific
+icons for Message Server entries</b>  </p> <p>Provide bitmap icons for messages,
+folders, and services for display in the various folder views. For each icon,
+an array of bitmaps should be available, giving the icon in a number of sizes. </p> </li>
+<li id="GUID-2830B9E2-B9D1-50AF-B6E9-43D187BE053A"><p> <b>Provide user interface
+text</b>  </p> <p>Provide command captions for MTM-specific functions that
+the Messaging client application can dynamically add to menus and dialog controls.
+A function ID is associated with each caption to identify the MTM-specific
+function that should be invoked when the command is chosen. This data is encapsulated
+in a resource of the <codeph>MTUD_FUNCTION</codeph> type. </p> </li>
+<li id="GUID-24B76538-A4BB-5996-9187-EC03393C35A9"><p> <b>Verification of
+MTM functions</b>  </p> <p>Validate the specified functions that are available
+on a particular entry, so that a Messaging client application can process. </p> <p>It
+is intended that client applications use the <xref href="GUID-F5466277-25C7-31BD-8129-A0FF3D84FC03.dita"><apiname>OperationSupportedL()</apiname></xref> function
+to dynamically set the user interface features that are available depending
+on the entry currently selected within the application. For example, menu
+items that do not apply to particular entries could be greyed out. </p> </li>
+</ul> <p>The <xref href="GUID-899C6D87-5712-34A7-902C-EA452894700C.dita"><apiname>CBaseMtmUiData</apiname></xref> class provides the virtual
+functions for overriding in derived classes.</p> </section>
+</conbody><related-links>
+<link href="GUID-59217FA7-3078-53CA-88B3-78D6FB788271.dita"><linktext>MTM     
+           overview</linktext></link>
+<link href="GUID-BAD138D5-2914-5C6E-9FA4-F7A3CCB85E6D.dita"><linktext>MTM     
+           Capabilities</linktext></link>
+<link href="GUID-1E2DB50A-D8D7-595D-8448-77F057655E82.dita"><linktext>Writing a
+UI Data MTM </linktext></link>
+</related-links></concept>
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