在应用程序中，通常使用配置文件定义一些参数。例如，数据库配置文件用于记录数据库的字符串连接，主机名，用户名，密码等信息。Windows的ini文件就是典型的配置文件，ini文件由多个块组成，每个块由多个配置项组成。
[ODBC 32 bit Data Sources]
MS Access Database = Microsoft Access Driver (*.mdb) (32)
Excel Files = Microsoft Excel Driver (*.xls) (32)
dBASE Filrs = Microsoft dBase Driver (*.dbf) (32)
[MS Access Database]
Driver32 = C:\WINDOWS\system32\odbcjt32.dll
[Excel Files]
Driver32 = C:\WINDOWS\system32\odbcjt32.dll
[dBASE Files]
Driver32 = C:\WINDOWS\system32\odbcjt32.dll
MS Access Database = Microsoft Access Driver (*.mdb) (32)
Excel Files = Microsoft Excel Driver (*.xls) (32)
dBASE Filrs = Microsoft dBase Driver (*.dbf) (32)
[MS Access Database]
Driver32 = C:\WINDOWS\system32\odbcjt32.dll
[Excel Files]
Driver32 = C:\WINDOWS\system32\odbcjt32.dll
[dBASE Files]
Driver32 = C:\WINDOWS\system32\odbcjt32.dll