wpkg-zabbix_agent/packages/zabbix_agent.xml

<?xml version="1.0" encoding="UTF-8"?>
<packages>
    <package id="zabbix_agent"
             name="Agent de supervision Zabbix"
             revision="15"
             priority="10"> 

        <variable name="PKG_VERSION" value="2.4.6" />
        <variable architecture="x86" name="MSI" value="%SOFTWARE%\zabbix_agent\zabbix_agent-%PKG_VERSION%_x86.msi" />
        <variable architecture="x64" name="MSI" value="%SOFTWARE%\zabbix_agent\zabbix_agent-%PKG_VERSION%_x64.msi" />

        <check type="uninstall" condition="versiongreaterorequal" path="Zabbix Agent" value="%PKG_VERSION%"/>

        <install cmd='msiexec /qn /i "%MSI%" SERVER=%ZBX_SERVER_IP% RMTCMD=0' />
        <install cmd='netsh firewall add portopening TCP 10050 "Zabbix Agent" enable custom "%ZBX_SERVER_IP%"' />
        <install cmd='%COMSPEC% /C sc start "Zabbix Agent"'>
            <exit code="any" />
        </install>

        <upgrade cmd='%COMSPEC% /C sc stop "Zabbix Agent"'>
            <exit code="any" />
        </upgrade>        
        <upgrade include="install" />

        <downgrade cmd='%COMSPEC% /C sc stop "Zabbix Agent"'>
            <exit code="any" />
        </downgrade>
        <downgrade include="install" />
 
        <remove cmd='%COMSPEC% /C sc stop "Zabbix Agent"'>
            <exit code="any" />
        </remove>
        <remove cmd='%COMSPEC% /C msiexec /qn /norestart /x "%MSI%"' />
        <remove cmd='netsh firewall delete portopening TCP 10050' />

    </package>
</packages>