The DSN - Database Source Name File is a file used to connect to a particular database by a variety of programs that are database reliant. These files describe database properties; things like the source of the data, directory, and name are some of the properties described. It also describes the connection driver, the server address, user ID and the password. ODBC drivers use the DSN to connect to a specific database, the SQL Server or Microsoft Access database for instance. The most common way that these type files are stored are in plain text files; yet, some programs use certain entries that are contained in the Windows operating system registry file. Windows has an ODBC included in its basic package that may be used to generate DSN files. It is located in the Windows Control Panel under the Admin. Tools Link.