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<concept id="GUID-D7DF85A8-1F90-5EC8-9EA1-EB33382849B0" xml:lang="en"><title>TAndRClasses: typical ‘T’ and ‘R’ type classes</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<section id="GUID-B210D03B-5045-41C5-A940-BD10B6A5935E"><title>Description</title> <p> <filepath>TAndRClasses</filepath> shows a typical ‘T’ class and a typical ‘R’ class. </p> <p>The ‘T’

type is a value type, owning no external object. </p> <p>The ‘R’ type

is a resource type; typically this is proxy for an object owned elsewhere.

In practice, the 'R' type is a handle to a resource owned and managed

by the Kernel. </p> <p>In this example, the ‘R’ class derives from

the standard Symbian platform handle class <codeph>RTimer</codeph>. </p> </section>

<section id="GUID-7D492862-C13A-46D5-9C98-85A942A97E85"><title>Download</title> <p>Click on the following link to

download the example: <xref href="guid-6013a680-57f9-415b-8851-c4fa63356636/zips/guid-1bfb2b42-8897-4660-8409-5e9fd441745b.zip" scope="external"> TAndRClasses.zip</xref></p><p>Click on the following

link to download additional files: <xref href="guid-6013a680-57f9-415b-8851-c4fa63356636/zips/guid-bd05bfa4-e51c-4cf7-b327-646b0b9e814d.zip" scope="external">CommonFramework.zip</xref></p><p>Click <xref href="guid-6013a680-57f9-415b-8851-c4fa63356636/guid-1bfb2b42-8897-4660-8409-5e9fd441745b.html" scope="peer"> browse TAndRClasses </xref> to view the example code.</p><p>Click <xref href="guid-6013a680-57f9-415b-8851-c4fa63356636/guid-bd05bfa4-e51c-4cf7-b327-646b0b9e814d.html" scope="peer">CommonFramework</xref> to view additional files.</p> </section>

<section id="GUID-C08E8FD5-CB0D-4FAD-94F3-3EBCF3D71586"><title>Class summary</title><p> <xref href="GUID-8A423EA2-4264-30C9-9579-0466994E6E88.dita"><apiname>RTimer </apiname></xref>  <xref href="GUID-CD0A798E-7E42-3689-8E86-F5FD43C758FC.dita"><apiname>TCleanupItem </apiname></xref> <xref href="GUID-0DD554D7-B9B1-3FD3-898F-4D855144FCEA.dita"><apiname>CleanupStack </apiname></xref>  <xref href="GUID-E0B34F3E-D4C4-3232-B8B1-7DB35B454646.dita"><apiname>TRequestStatus</apiname></xref> </p></section>

<section id="GUID-F05BA78D-979A-4DB8-92F5-A446FCDBE808"><title>Build</title> <p>The example includes the two project

files needed for building: <filepath>bld.inf</filepath> and the <filepath>.mmp</filepath> file. </p> <p> The Symbian platform build process

describes how to build this application, which results in an executable

called: </p> <p> <filepath>\epoc32\release\&lt;target&gt;\&lt;urel

or udeb&gt;\TANDRCLASSES.EXE</filepath>. </p> </section>

<section id="GUID-E7FA611D-AD03-42E8-835D-2F8CE873B929"><title>Usage</title> <p>Run the executable <filepath>TANDRCLASSES.EXE</filepath>. </p> <p>Executables for the emulator targets <filepath>wins</filepath> and <filepath>winscw</filepath> can be run on your PC. Executables

for ARM targets must be copied to your target platform before being

run. </p> </section>