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How To Identify the Jet Database Engine Components

This article was previously published under Q141796
Jet is the default database engine for Visual Basic as well as other Microsoft applications such as Microsoft Access, Microsoft Excel, Project, and Microsoft Foundation Classes (MFC). Which version of Jet you are using can be unclear because Visual Basic and other applications using Jet are continually being updated. The tables and explanations in this article are intended to help you identify the version and components of Jet that you are using for the given application.
The list below displays which version of Jet is shipped with each of the following products:
Application                  Microsoft JET version----------------------------------------------------Microsoft Access 1.0             1.0Microsoft Access 1.1             1.1Microsoft Access 2.0             2.0Microsoft Access 2.0             2.5 with Microsoft Access Service PackMicrosoft Access 7.0             3.0Microsoft Access 97              3.5Visual Basic 3.0                 1.1Visual Basic 3.0                 2.0 with Visual Basic Compatibility LayerVisual Basic 3.0                 2.5 with Microsoft Access Service PackVisual Basic 4.0 16-bit          2.5Visual Basic 4.0 32-bit          3.0Visual Basic 5.0 32-bit          3.5Microsoft Excel 7.0              3.0Microsoft Excel 97               3.5Microsoft Project                2.0Microsoft Foundation Classes     3.0				

Compatibility Among Versions

With each new version of Microsoft Jet, enhancements in functionality and changes to the structure of the database file cause problems with backward compatibility. Wherever possible, efforts have been made to ensure an easy migration path among versions. However, incompatibilities do exist. The following table illustrates how database files and objects can be used among different versions of Microsoft Jet.
Jet Version                         1.0   1.1   2.0   2.5   3.0   3.5   3.51				
-----------------------------------------------------------------MDB Version      1.0     Y     Y     Y     Y     Y     Y     Y                 1.1     N     Y     Y     Y     Y     Y     Y                 2.0     N     N     Y     Y     Y     Y     Y                 2.5     N     N     N     Y     Y     Y     Y                 3.0     N     N     N     N     Y     Y     Y                 3.5     N     N     N     N     N     Y     Y                 3.51    N     N     N     N     N     N     Y				
A "Y" indicates that the database can be used without conversion; "N" indicates that the database cannot be used or converted. With DAO code you can open any version of any database up to the same version of Microsoft Jet. However, Microsoft Access can open only those databases with the same version as itself, but it can link to tables with the same or earlier version. In other words, if you upgrade to Microsoft Jet 3.0, you will still be able to read version 2.x databases.

Notice that Visual Basic 3.0 is capable of using three different versions of Jet each requiring a separate set of dynamic link libraries (.dlls). This can cause problems when your Visual Basic application expects to use Jet 2.0 for example, and then another Visual Basic application using an earlier version of Jet gets installed on the same system replacing some of the version 2.0 .dlls with version 1.1. Typically the problem .dll in this situation is VBDB300.DLL because it determines which version of the Jet engine will be used.

The following table should help you solve any version conflicts and help you identify the version of Jet you are using. You may use the Wps.exe utility shipped with Visual Basic to find out which version of Jet you currently have loaded in memory. Wps.exe is located in the \VB\CDK directory of Visual Basic 3.0 Professional, and in \TOOLS\PSS directory of the Visual Basic 4.0 CD. Pay special attention to the version information obtained from File Manager (File, Properties) in Visual Basic 3.0, and Microsoft System Info. in Visual Basic 4.0 32-bit.

The following files are required by Visual Basic to use the Jet Database Engine:
Jet Version    File          Version     Description--------------------------------------------------------------1.1            VBDB300.DLL   3.00.0528   VB/JET support               MSAES110.DLL  1.10.0000   Expression services               MSAJT110.DLL  1.10.0001   Jet 1.1 engine               XBS110.DLL    1.10.0002   External xBASE ISAM               BTRV110.DLL   1.10.0000   External Btrieve ISAM               PDX110.DLL    1.10.0000   External Paradox ISAM2.0 (comlyr)   VBDB300.DLL   3.00.0529   VB/JET support               MSAJT112.DLL  1.99.1605   Jet 2.x comp. loader               MSAJT200.DLL  2.00.0000   Jet 2.0 engine               XBS200.DLL    2.00.0000   External xBASE ISAM               BTRV200.DLL   2.00.0000   External Btrieve ISAM               PDX200.DLL    2.00.0000   External Paradox ISAM2.5 (accsvc)   VBDB300.DLL   3.00.0529   VB/JET support               MSAJT112.DLL  1.99.1605   Jet 2.x comp loader               MSAJT200.DLL  2.50.1606   Jet 2.5 engine               MSJETERR.DLL  2.50.1108   Error services               MSJETINT.DLL  2.50.1108   International               XBS200.DLL    2.50.1108   External xBASE ISAM               BTRV200.DLL   2.50.1108   External Btrieve ISAM               PDX200.DLL    2.50.1108   External Paradox ISAM2.5 (VB4 16)   VBDB16.DLL    4.00.2422   VB/JET support               MSAJT200.DLL  2.50.1606   Jet 2.5 engine               MSJETERR.DLL  2.50.1111   Error services               MSJETINT.DLL  2.50.1111   International               XBS200.DLL    2.50.1117   External xBASE ISAM               BTRV200.DLL   2.50.1117   External Btrieve ISAM               PDX200.DLL    2.50.1117   External Paradox ISAM               MSXL2016.DLL  2.50.1117   External Excel ISAM               MSTX2016.DLL  2.50.1117   External Text ISAM3.0            MSJT3032.DLL  Jet 3.0 engine               MSJINT32.DLL  International               MSJTER32.DLL  Error services               MSXL3032.DLL  External Excel ISAM               MSRD2X32.DLL  External Jet 2.0 ISAM               MSLT3032.DLL  External Lotus ISAM               MSPX3032.DLL  External Paradox ISAM               MSXB3032.DLL  External xBASE ISAM               MSTX3032.DLL  External Text ISAM3.5            MSJET35.DLL   3.50.3602.4 Jet 3.5 engine               MSJTER35.DLL  3.50.3602.0 Error service               MSJINT35.DLL  3.50.3602.5 International               MSXBSE35.DLL  3.50.3428.0 External xBASE ISAM               MSEXCL35.DLL  3.50.3428.0 External Excel ISAM               MSTEXT35.DLL  3.50.3428.0 External Text ISAM               MSRD2X35.DLL  3.50.3602.0 External Jet 2.x ISAM               MSPDOX35.DLL  3.50.3428.0 External Paradox ISAM               MSLTUS35.DLL  3.50.3428.0 External Lotus ISAM3.51 (SR-1)    MSJET35.DLL   3.51.0623.4  Jet 3.51 engine               MSJTER35.DLL  3.51.0623.0  Error service               MSJINT35.DLL  3.51.0623.0  International               MSXBSE35.DLL  3.50.3907.0 External xBASE ISAM               MSEXCL35.DLL  3.50.3907.0 External Excel ISAM               MSTEXT35.DLL  3.50.3907.0 External Text ISAM               MSRD2X35.DLL  3.50.3907.0 External Jet 2.x ISAM               MSPDOX35.DLL  3.50.3907.0 External Paradox ISAM               MSLTUS35.DLL  3.50.3907.0 External Lotus ISAM				
The following files are available for download from the Microsoft Download Center:
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.
Microsoft Jet Database Engine Programmer's Guide, by Dan Haught and Jim Ferguson, Microsoft Press 1995 For additional information, please click the article numbers below to view the articles in the Microsoft Knowledge Base:
113683 FILE: Fact Sheet on Jet 2.0/VB 3.0 Compatibility Layer
122927 WX1124: Microsoft Access Version 2.0 Service Pack
172733 Updated Version of Microsoft Jet 3.5 Available on MSL
Comlyr Accsvc

Article ID: 141796 - Last Review: 08/05/2004 17:14:43 - Revision: 3.4

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