Besides using DAO, a connection string to a database using ADO can also be set. In ADO connection string, we use at least four constants to be set to specify the connection string. They are constStrProvider,constStrDataSource, constStrUserId, and constStrPassword. The constStrProvider Const specifies database provider to be employed, for example: the provider for MS Access database is Microsoft.ACE.OLEDB.12.0. The constStrDataSource Const refers to the database file path. The constStrUserId Const refers to user identity, if the database use access level. If the connection string has a password, then the constStrPassword Const must also be set.
Simply Learning Access Database And VBA