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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->+
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<!-- This component and the accompanying materials are made available under the terms of the License +
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"Eclipse Public License v1.0" which accompanies this distribution, +
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->+
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<!-- Initial Contributors:+
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    Nokia Corporation - initial contribution.+
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Contributors: +
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-->+
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<!DOCTYPE concept+
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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">+
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<concept id="GUID-B526BA3A-14E4-53B4-9382-437475A1C8A4" xml:lang="en"><title>Patchable+
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Constants</title><prolog><metadata><keywords/></metadata></prolog><conbody>+
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<p>From version 9.3 of Symbian OS, DLLs can export certain constants.+
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These are referred to as patchable constants, and you can change their+
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values when the DLLs from which they are exported are incorporated+
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into a ROM image. </p>+
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<p>This gives you the ability to create a variety of ROM images with+
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constants of different values without the need to change any source+
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code nor to rebuild the DLLs. </p>+
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<p>You change the value of a constant when you build your ROM image+
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by adding the patchdata keyword into your <filepath>.oby</filepath> file. </p>+
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<p>See : Symbian^3 Tools Guide &gt; Building. </p>+
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</conbody></concept>+
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