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<concept id="GUID-651C2913-2AB9-5873-B296-5C4233967F21" xml:lang="en"><title>CONE

resource loader overview</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<section id="GUID-57F77D80-D411-48CE-9C2F-2E274027D791"><title>Purpose</title> <p>The CONE Resource Loader utility is part

of the Symbian CONE component, and it offers methods for opening and closing

resource files. The actual reading of resources from an opened resource file

is done using various <xref href="GUID-D2A3BE13-6CD9-3418-AA81-4466B76CF844.dita"><apiname>CCoeEnv</apiname></xref> provided

resource-reading methods. </p> </section>

<section id="GUID-691C3034-6DBE-4C5A-8F6A-E18C805EA4EE"><title>Architectural Relationships</title> <p>This utility is implemented

as a single class, <xref href="GUID-D2A3BE13-6CD9-3418-AA81-4466B76CF844.dita"><apiname>RCoeResourceLoader</apiname></xref>.

Access to the <xref href="GUID-D2A3BE13-6CD9-3418-AA81-4466B76CF844.dita"><apiname>CCoeEnv</apiname></xref> instance

is required in order to use this utility. </p> <p>CONE Resource Loader can

be accessed through the <xref href="GUID-D2A3BE13-6CD9-3418-AA81-4466B76CF844.dita"><apiname>RCoeResourceLoader</apiname></xref> class

that is defined in the header <codeph>CoeUtils.h</codeph>. The actual component

is linked to the <codeph>cone.dll</codeph> library. </p> </section>

<section id="GUID-5B6C86F8-C914-4329-891A-20088D589EC3"><title>Description</title> <p><b>Usage</b> </p> <p>CONE Resource

Loader functionality can be accessed via public methods on an <xref href="GUID-D2A3BE13-6CD9-3418-AA81-4466B76CF844.dita"><apiname>RCoeResourceLoader</apiname></xref> instance. </p> <p>To use, an instance of <xref href="GUID-D2A3BE13-6CD9-3418-AA81-4466B76CF844.dita"><apiname>RCoeResourceLoader</apiname></xref> is

first created. Then calling either one of the open methods of <xref href="GUID-D2A3BE13-6CD9-3418-AA81-4466B76CF844.dita"><apiname>RCoeResourceLoader</apiname></xref> opens

the resource file. After the resource file is no longer needed, it must be

closed. </p> <p>A single instance of <xref href="GUID-D2A3BE13-6CD9-3418-AA81-4466B76CF844.dita"><apiname>RCoeResourceLoader</apiname></xref> can

only have a maximum of one resource file open at any time. If multiple simultaneously

open files are required, instantiate a separate <xref href="GUID-D2A3BE13-6CD9-3418-AA81-4466B76CF844.dita"><apiname>RCoeResourceLoader</apiname></xref> for

each required file. </p> <p><b>Example</b> </p> <p>The following example shows

how to use the <xref href="GUID-D2A3BE13-6CD9-3418-AA81-4466B76CF844.dita"><apiname>RCoeResourceLoader</apiname></xref> class: </p> <codeblock id="GUID-8F442DC2-E73B-537A-9A32-9C61280B8FF6" xml:space="preserve">#include &lt;CoeUtils.h&gt;

// … Other code …

// Get CCoeEnv instance

CEikonEnv* eikEnv = CEikonEnv::Static();

// Initialize loader

RCoeResourceLoader rLoader(eikEnv);

// Open resource file

_LIT( KSampleResourceFileName, "Z:\\System\\Apps\\sample\\sample.rsc" );

TFileName fileName(KSampleResourceFileName);

rLoader.OpenL(fileName);

// Push resource loader to cleanup stack, so that it will always be properly 

// closed when popped.

CleanupClosePushL(rLoader);

// Read a resource   

iSomeArray = eikEnv->ReadDesC16ArrayResourceL(R_SOME_RESOURCE);

// Pop and destroy rLoader from stack. 

// This also calls close on rLoader since CleanupClosePushL was used.

CleanupStack::PopAndDestroy(); // rLoader

</codeblock> <p>For more information on individual methods, please see the

reference API for <xref href="GUID-D2A3BE13-6CD9-3418-AA81-4466B76CF844.dita"><apiname>RCoeResourceLoader</apiname></xref>. </p> </section>

</conbody></concept>