如何设置ODBC .DSN文件以允许它访问Postgresql中的任何数据库？

I'm writing an MFC App to automatically configure Postgresql with ODBC for use by another app. The idea being that the user runs the app and it automatically creates the database and the tables within it. My problem is that when I set up the File DSN it seems to require the name of the database it will access. This appears in the DSN file as ..I'm writing an MFC App to automatically configu