1. Opening through ODBC DSN (interface: ADO or BDE). Select ODBC data source option and then select the ODBC DSN from the drop-down list. But first, you should create an ODBC DSN of the corresponding type using Windows administrative tools and point it to the folder with .dbf files.

2. Opening by specifying file name (interface: ADO or BDE). Select File option and then browse for the needed file.

3. Opening by specifying folder name (interface: ADO or BDE). Select Folder option, select a driver from the drop-down list, and then browse for the folder with .dbf files.

4. Opening through connection string (interface: ADO). Select Connection string option and write a connection string. This way is the most flexible one because it allows to specify many additional parameters of the database connection. It is recommended for advanced users. Here are basic connection strings (more examples and details can be found in the Internet):

Provider=Microsoft.Jet.OLEDB.4.0;dBase 5.0;DATABASE=C:\MyDBaseFolder;

Provider=Microsoft.Jet.OLEDB.4.0;dBase IV;DATABASE=C:\MyDBaseFolder;

Provider=MSDASQL.1;Extended Properties="DefaultDir=C:\MyDBaseFolder;Driver={Microsoft dBase Driver (*.dbf)};DriverId=277;"

Provider=MSDASQL.1;Data Source=DBF_DATA;Extended Properties="DSN=DBF_DATA;DefaultDir=C:\MyDBaseFolder;DriverId=533;FIL=dBase 5.0;"

Provider=Microsoft.ACE.OLEDB.12.0;Data Source=c:\MyDBaseFolder;Extended Properties=dBASE IV;   (Microsoft ACE must be installed)

The application bitness (32 or 64) must match with the bitness of the used third-party components (ODBC drivers, OLEDB providers etc).
Sometimes, old BDE gives better experience comparing with ADO when working with DBF files. If you choose BDE, make sure to use Exportizer 32-bit.

See also

 Connection Strings Examples