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data-source-names-and-64-bit-operating-systems.md

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data-source-names-and-64-bit-operating-systems.md

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title Data Source Names and 64-Bit Operating Systems
description Learn how to build and run an application as a 32-bit application on a 64-bit operating system by creating the ODBC data source with the ODBC Administrator.
author markingmyname
ms.author maghan
ms.date 03/06/2017
ms.service sql
ms.subservice native-client
ms.topic reference

Data Source Names and 64-Bit Operating Systems

[!INCLUDE SQL Server]

Important

[!INCLUDEsnac-removed-oledb-and-odbc]

To build and run an application as a 32-bit application on a 64-bit operating system, you must create the ODBC data source with the ODBC Administrator in %windir%\SysWOW64\odbcad32.exe.

Remarks

A 64-bit Windows operating system has two odbcad32.exe files:

  • %SystemRoot%\system32\odbcad32.exe is used to create and maintain data source names for 64-bit applications.

  • %SystemRoot%\SysWOW64\odbcad32.exe is used to create and maintain data source names for 32-bit applications, including 32-bit applications that run on 64-bit operating systems.

See Also

SQL Server Native Client (ODBC)