The Microsoftâ Windows® installer database documentation contains overview and reference material for developers who want to write tools that create or modify installer packages. Complete installer packages are then adopted by application developers as means to manage the installation of their applications. Some of the general information in this section is also useful for application developers and administrators who want to modify existing installer packages and installation processes by using custom actions. To help you find the information you need, the following list shows the main sections in the installer database documentation: