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ODCB settings in the Windows registry on 32 and 64 bit windows

Posted by jpluimers on 2020/03/27

  • While 32-bit applications can run on 64-bit machines, they cannot use 64-bit ODBC drivers. A 64-bit application must use a 64-bit ODBC driver, and a 32-bit application must use a 32-bit ODBC driver.
  • ODBC.INI registry paths for the various permutations:
    • User DSNs for for 64-bit and 32-bit applications
      • HKEY_CURRENT_USER\Software\ODBC\ODBC.INI
    • System DSNs for 64-bit applications on 64-bit Windows and 32-bit applications on 32-bit Windows
      • HKEY_LOCAL_MACHINE\SOFTWARE\ODBC\ODBC.INI 
    • System DSNs for 32-bit applications on 64-bit Windows
      • HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\ODBC\ODBC.INI

Via: [WayBack] Windows registry on 32 and 64 bit windows, which also explains ODBCINST.INI to define drivers.

–jeroen

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