The log flags a key as “created” if it did not already exist. The value of the IFX_PRODUCT_NAME variable The value of the IFX_COMPANY_NAME variable In this case, the InstallScript engine logs several keys: 'Software' ^ IFX_COMPANY_NAME ^ IFX_PRODUCT_NAME For example, you might pass the following for szKey: When logging is enabled, the InstallScript engine logs each key in the path that is passed through szKey to RegDBCreateKeyEx. The newly created key does not have a value associated with it. You can also associate a class object with the newly created key (advanced users only). The RegDBCreateKeyEx function creates a key in the registry.

Handling all of your registry changes in this way allows for a clean uninstallation through the Windows Installer service. Project: For InstallScript MSI and Basic MSI projects, it is recommended that you use the Registry view in InstallShield instead of creating registry keys and values through InstallScript code. InstallShield 2015 » InstallScript Language Reference

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Advanced installer registry