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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-&gt;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>