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MDAC

This portion of the MSDN Data Access and Storage Developer Center hosts information on Microsoft's native-code data access technologies: ADO, OLEDB, ODBC, and others. Look to this site to get the latest MDAC release and all supported releases, as well as documentation, code samples, support resources, and community.

MDAC 2.8 SP1

This is the redistributable installer for the MDAC 2.8 SP1 release; it installs the same Data Access components as Microsoft Windows XP SP2 and Microsoft SQL Server 2000 SP4. This release does not include Microsoft Jet, the Microsoft Jet OLE DB Provider or ODBC driver, the Desktop Database ODBC Drivers, or the Visual FoxPro ODBC Driver.
MDAC Road Map
Learn about the past, present, and future of the Microsoft data access technologies, including DB-Library, ESQL, DAO, Microsoft® Data Access Components (MDAC) (including ODBC, ADO, and OLE DB), and ADO.NET. This article identifies which technologies are being enhanced, and which technologies and components are being deprecated or excluded from future releases.
MDAC 2.8

This is the redistributable installer for the MDAC 2.8 release; it installs the same Data Access components as Microsoft Windows Server 2003. This release does not include Microsoft Jet, the Microsoft Jet OLE DB Provider or ODBC driver, the Desktop Database ODBC Drivers, or the Visual FoxPro ODBC Driver.
MDAC 2.8 Software Development Kit
The MDAC 2.8 SDK is for developers who are building applications using ADO, OLE DB, and ODBC. It contains updated documentation, headers, libs and typelibs for x86, IA64 and AMD64 platforms, as well as updated sample applications and developer tools.
MDAC 2.8 Documentation
Browse the MDAC 2.8 SDK Documentation in the MSDN Library.

ODBC

Microsoft Open Database Connectivity (ODBC) SDK Documentation
Check out the ODBC content in the MDAC 2.8 documentation.

OLE DB

Microsoft OLE DB SDK Documentation
Read about the OLE DB content in the MDAC 2.8 documentation.
Meditating on OLE DB and .NET
Follow the musings of Dino Esposito as he attempts to answer the question, "What is software exactly?"
OLE DB Minimum Levels of Consumer and Provider Functionality
Learn how to use OLE DB as a component technology in this article that describes the minimal levels of functionality that an OLE DB consumer should expect from a general-purpose OLE DB provider.

ADO

Microsoft Active X Data Objects (ADO) SDK Documentation
Read the ADO content in the MDAC 2.8 documentation.
ADO Programmer's Guide
Check out the ADO programming content in the MDAC 2.8 documentation.
Revisiting the Use of ADO in .NET Applications
Learn how to use a data adapter to import an ADO recordset in this column by Dino Esposito.
ADO Command Strategies
Discover some tips and tricks on using the ADO Command object. Although this article was written for the Visual Basic developer, most of its points are language-neutral.

MDAC Resources

MDAC Technology Information
Get introductory and conceptual material on MDAC and its component technologies.
MDAC Downloads
Look here for all the key downloads for MDAC, including major releases and service packs, release manifests, and downloadable documentation.
MDAC Support and Community
Here you'll find links to the MDAC Support Center on support.microsoft.com, as well as newsgroups related to MDAC technologies such as ADO, OLEDB, and ODBC.