Question

You can direct the installer to perform actions before a page is shown by using a <preShowPageActionList> section. The following example presents the user with information that stored in a registry key under Windows and in an environment variable under Linux.

        <infoParameter>
                <preShowPageActionList>
                  <registryGet>
                 <variable>some_info</variable>
                     <key>HKEY_LOCAL_MACHINE\SOFTWARE</key>
                    <name>MYAPP</name>
                    <ruleList>
                      <compareText>
                       <text>${platform_name}</text>
                       <logic>equals</logic>
                       <value>windows</value>
                      </compareText>
                    </ruleList>
                 </registryGet>
                 <setInstallerVariable>
                   <name>some_info</name>
                   <value>${env(SOMEINFO)}</value>
                   <ruleList>
                      <compareText>
                       <text>${platform_name}</text>
                       <logic>equals</logic>
                       <value>linux</value>
                      </compareText>
                   </ruleList>
                  </setInstallerVariable>
                </preShowPageActionList>
                <name>display_info</name>
                <title>License File Information</title>
                <explanation>This screen shows important information about licensing issues</explanation>
                <value>Important Information! Setup has detected the following : ${some_info}.
              In the following screen you will be asked to confirm the information or enter a new (...)</value>
        </infoParameter>