ADO is the current preferred means of connecting a program to a data source in an MS Windows environment. This article describes how to connect to a text or dbase file data source using ADO without first creating an ODBC DSN.
On occasion, users have the need to supplement records in their database without removing data already stored for those records. An example would be if you have a data source that provides you all the crash data you need except for direction from intersection. You have another source that can provide direction from intersection and uses the same caseid number that the first data source uses. This is a use for Supplemental importing.