I am fairly new to Installshield. I just finished up developing one Installer that includes two registry values. One that is just called Install and is a DWord. The other is a string value that is called InstallPath, it contains the directory path of that program.
I am now creating a second Installer that is an Add on to the first one. Instead of having the user choose the Install Path. I want to be able to check the registry value of the first installer and use that value as the Install Directory.
Try using a System Search for the registry key where the install path is and store that value in a property of your own name.
Then, create a Custom Action to set the INSTALLDIR property from your new property name. Please this CA in the User Interface Sequence. I have one immediately after "MigrateFeatureStates".
In my installation I use this to pick up the original installation path on an upgrade installation.
