It’s been a long time since I needed to create a setup project.

However, now I need to create a setup project that will install an Excel add-in.

I can check if the Excel is installed by a ‘Registry search’ (by checking the HKLMSOFTWAREMicrosoftOffice16.0ExcelInstallRootPath registry value) and it works, as shown in the images below.

But, unfortunately, when I try to use the registry property [OFFICE_INSTALL_PATH] as the default location for the [INSTALLDIR] property (as shown below) the installer, when executing, goes haywire.

The installer thinks that the path is in a network location.

As it can be seen I’m using the default Setup project.

Is it possible to do what I want here?