In Basic MSI projects, Setup.inx is streamed into the Windows Installer package to facilitate InstallScript custom actions. 📂 File Architecture and History
If you need to show what an INX file looks like internally: Installshield Setup Inx
In older versions of InstallShield (pre-version 6), this file was often named Stack Overflow Troubleshooting Common Errors If you encounter errors like In Basic MSI projects, Setup