The Microsoft® SQL Server™ ODBC driver is installed automatically when you install the SQL Server client software on a computer running Microsoft Windows NT® or Microsoft Windows® 95. For more information about installing SQL Server client software, see Running SQL Server Setup.
If you have servers running SQL Server version 4.21a, 6.0, or 6.5, you must install the Instcat.sql file included with this driver on those servers before using the driver to access them. Each version of the SQL Server ODBC driver is developed in conjunction with a specific version of the catalog stored procedures. Instcat.sql upgrades the catalog stored procedures to the version required by the ODBC driver. This version of the catalog stored procedures is compatible with existing SQL Server applications.