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<concept id="GUID-1FE5D4D5-B2BF-4090-9F69-D538B2220DA3" xml:lang="en"><title>Handle

Global Variable Example</title><shortdesc>This example demonstrates: </shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>How to handle global variables within the library code </p>

<p>How to use WSD (Writable Static Data) in dll</p>

<section id="GUID-026FD8D6-6C4A-5958-B289-775D4AE1E756-GENID-1-12-1-13-1-1-5-1-3-1-11-1-10-1-3-3"><title>Download</title> <p>Click

on the following link to download the example: <xref href="guid-6013a680-57f9-415b-8851-c4fa63356636/zips/guid-723e559a-ab8e-435f-a34c-78b7a32f1fb9.zip" scope="external"> handleglobalvar.zip</xref></p><p>Click: <xref href="guid-6013a680-57f9-415b-8851-c4fa63356636/guid-723e559a-ab8e-435f-a34c-78b7a32f1fb9.html" scope="peer">browse</xref> to view the example code. </p> </section>

<section id="GUID-7E7C4564-B10E-41F9-8A9D-D8A6C5E9C51C-GENID-1-12-1-13-1-1-5-1-3-1-11-1-10-1-3-4"><title>Design and

Implementation</title> <p>The following sections provide information about

the implementation of the example.</p> <p><b>Capabilities</b> </p>The

program capabilities are defined in <filepath>globalvarex.mmp</filepath>:<codeph> CAPABILITY

NONE</codeph>. Libwsddll library capabilities are defined in<filepath>libwsddll.mmp</filepath> file: <codeph>CAPABILITY

ALL -TCB</codeph>. <p><b> Application Launching</b> </p>The application can

be launched by executing globalvarex from eshell. <p><b>libwsd library </b></p>This

library is used to get/set dll global Data. It demonstrates how to handle

WSD (Writable Static Data).<p><b>How to handle WSD in dll</b></p>Collect all

global variables within the structure TWsdData and creat the instance whenever

it's required. For target release, use global variables and add EPOCALLOWDLLDATA

in the library mmp file. wsddll.h and wsddll.cpp implement the concept of

how to handle WSD data in Dll. </section>

<section id="GUID-67A72761-1D92-46D1-B1C9-7455978BDE4E-GENID-1-12-1-13-1-1-5-1-3-1-11-1-10-1-3-5"><title>Building and

Using</title> To build the handleglobalvar example application, go to the

handleglobalvar\group directory and build the application.  The definition

for the whole application can be found in the bld.inf file in the group subdirectory

of the applications main directory. </section>