The cursor library (shipped with the SQL Server driver) allows applications to use multiple active statements on a connection, as well as scrollable, updateable cursors. The cursor library (ODBCCURS.DLL (16-bit) or ODBCCR32.DLL (32-bit)) must be loaded to support this functionality. Use SQLSetConnectOption to specify how the cursor library should be used and SQLSetStmtOption to specify the cursor type, concurrency, and rowset size.