How Visual Installer handles Registry It is common that setup programs need to add keys and values to the Registry (the registry database in Windows). Visual Installer includes an easy-to-use and flexible functionality to handle this. A special tab in the program, named Registry, contains functions to add and delete keys and values to/from the Registry during installations and uninstallations.     Before you create an installation, you can preview your settings and see how the keys and values will be entered into the registry. In this way you can quickly and easily locate errors before you've even have done an installation.