Typically, before you create a setup application, you create an INF file. An INF file is a text file that contains information used by your setup application during an installation. For more information, see INF Files.
After creating an INF file, you write the source code for your setup application. You can use the setup functions in your setup application to access the information in the INF file and perform installation operations. For more information about using the setup functions in an application, see Creating Setup Applications.