Hi,
In the next version of Advanced Installer (which will by available soon) Full UI customization will be available and then you can execute Custom Actions on Dialog buttons. Until then here some workaround: Go to "Dialogs" page and select "Installation Complete" dialog. On the "After Finishing Actions" view use the "Launch Application" action to launch a batch file. The batch file (include it in the package) is used to launch the shutdown.exe with command line.
This workaround works only if you don't use the "Launch Application" action to run the application after install.
The batch file looks like this:
Regards,
Gigi
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Gheorghe Rada
Advanced Installer Team
http://www.advancedinstaller.com