Access to Legacy Applications and Data

http://www.microsoft.com/data: The Microsoft Universal Data Access Web site provides product information, technical documents, and application development resources involving OLE DB, ADO/RDS, ODBC, and more.
http://www.microsoft.com/sna/default.asp: The Microsoft® SNA Web site provides information about current and future releases of Microsoft SNA Server 4.0 SP2, COMTI for CICS and IMS, and the OLE DB provider for VSAM and AS/400. Features include access to evaluation copies of SNA Server 4.0 SP2, as well as related software that can be downloaded. The site also offers planning, deployment, development, and support resources, training options, links to SNA specialists, and popular newsgroups of the SNA community.
http://msdn.microsoft.com/default.asp: MSDN Online offers up-to-date resources on all aspects of developing Web applications, including multitier ASP applications.