One quick way of find a connection string is to create a new text document and rename the extension to udl. Go through the wizard for connecting to a database like SQL Server. When done, open the file in a text editor and the data would look something like:
; Everything after this line is an OLE DB initstring
Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=ClientTracker;Data Source=ComputersName
Edit this by removing the "Provider=SQLOLEDB.1"