Article ID: 178880
Article Last Modified on 1/22/2007
APPLIES TO
- Microsoft Access 1.0 Standard Edition
- Microsoft Access 1.1 Standard Edition
- Microsoft Access 2.0 Standard Edition
- Microsoft Access 95 Standard Edition
- Microsoft Access 97 Standard Edition
- Microsoft Visual Basic 3.0 Professional Edition
- Microsoft Visual Basic 3.0 Professional Edition
- Microsoft Visual Basic 4.0 Standard Edition
- Microsoft Visual Basic 4.0 Enterprise Edition
- Microsoft Foundation Class Library 4.2, when used with:
- Microsoft Visual C++ 4.0 Standard Edition
- Microsoft Visual C++ 4.1 Subscription
- Microsoft Visual C++ 4.2 Professional Edition
- Microsoft Visual C++ 4.2 Professional Edition
- Microsoft Visual C++ 5.0 Standard Edition
This article was previously published under Q178880
SUMMARY
DAO is a COM wrapper around the Jet Engine, which is used by Microsoft Access, Excel, Project, Visual Basic, and the Microsoft Foundation Classes (among others). It can be confusing which version of Jet you are using because so many applications may distribute Jet onto your machine. 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.
MORE INFORMATION
This table displays which version of Jet is shipped with each of the following products.
Application Microsoft JET version
-----------------------------------------------------------------------
Microsoft Access 1.0 1.0
Microsoft Access 1.1 1.1
Microsoft Access 2.0 2.0
Microsoft Access 2.0 2.5 with Microsoft Access Service Pack
Microsoft Access 7.0 3.0
Microsoft Access 97 3.5 with Office 97
Microsoft Access 97 SR1 3.5 with Office 97SR1
Visual Basic 3.0 1.1
Visual Basic 3.0 2.0 with Visual Basic Compatibility
Layer
Visual Basic 3.0 2.5 with Microsoft Access Service Pack
Visual Basic 4.0 16-bit 2.5
Visual Basic 4.0 32-bit 3.0
Visual Basic 5.0 32-bit 3.0
Visual Basic 5.0 32-bit 3.5
Visual C++ 4.X 3.0
Visual C++ 5.0 3.5
Jet 3.51 (web download) 3.51 (Latest, 3.5 Binary compatible)
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 you can use database files and objects among different versions of Microsoft Jet.
Jet Version
--------------------------------
1.0 1.1 2.0 2.5 3.0 3.5
----------------------------------------------
MDB Version
-----------
1.0 Y Y Y Y Y Y
1.1 N Y Y Y Y Y
2.0 N N Y Y Y Y
3.0 N N N N Y Y
A "Y" indicates that you can use the database without conversion; "N" indicates that you cannot use or convert the database. With DAO code, you can open any version of any database up to the same version of Microsoft Jet. Microsoft Access is an exception to this rule because it can open only those databases with the same version as itself. However, 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.
There is no version 2.5 or 3.5 of an .mdb file (just 2.0 and 3.0), which are common to the x.0 and x.5 versions of Jet.
Jet 2.0 and Jet 2.5 use identical database formats in every aspect. Jet 2.0 can read databases created with Jet 2.5.
Microsoft Jet 3.5 databases have the same structure as Jet 3.0. Microsoft Jet 3.0 can read data from Microsoft Jet 3.5 tables. The main limitation here is that Microsoft Jet 3.5 may support additional properties on the database object that aren't recognized or taken advantage of by Microsoft Jet 3.0, but there aren't any data incompatibilities.
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 you install another Visual Basic application using an earlier version of Jet on the same system that replaces 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 ISAM
2.0 (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 ISAM
2.5 (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 ISAM
2.5 (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 ISAM
3.0 MSJT3032.DLL 3.0.0.2118 Jet 3.0 engine
MSJINT32.DLL 3.0.0.2118 International
MSJTER32.DLL 3.0.0.2118 Error services
MSXL3032.DLL 3.0.0.2001 External Excel ISAM
MSRD2X32.DLL 3.0.0.2118 External Jet 2.0 ISAM
MSLT3032.DLL 3.0.0.2008 External Lotus ISAM
MSPX3032.DLL 3.0.0.2001 External Paradox ISAM
MSXB3032.DLL 3.0.0.2008 External xBASE ISAM
MSTX3032.DLL 3.0.0.2008 External Text ISAM
With Jet 3.5x, there have been multiple releases. The following table indicates which version of Jet applies to a given product:
Access 97
Access 97a
FileName Office 97 VB5 Office 97a Jet 3.51
------------ ----------- ----------- ----------- -----------
MSEXCL35.DLL 3.50.3428.0 3.50.3602.5 3.50.3907.0 n/a
MSJET35.DLL 3.50.3428.0 3.50.3602.4 3.50.3907.5 3.51.0623.4
MSJINT35.DLL 3.50.3428.0 3.50.3602.5 3.50.3907.0 n/a
MSJTER35.DLL 3.50.3428.0 3.50.3602.0 3.50.3907.0 n/a
MSLTUS35.DLL n/a 3.50.3602.5 n/a n/a
MSPDOX35.DLL n/a 3.50.3602.0 n/a n/a
MSRD2X35.DLL 3.50.3428.0 3.50.3602.0 3.50.3907.0 n/a
MSREPL35.DLL 3.50.3428.0 3.50.3602.0 3.50.3907.1 3.51.0623.0
MSTEXT35.DLL 3.50.3428.0 3.50.3602.0 3.50.3907.0 n/a
MSXBSE35.DLL 3.50.3428.0 3.50.3602.0 3.50.3907.0 n/a
VBAJET32.DLL 3.0.0.6908 5.0.0.7122 3.0.0.6908 n/a
VBAR332.DLL 3.0.0.6908 3.0.0.6908 3.0.0.6908 n/a
REFERENCES
"Microsoft Jet Database Engine Programmer's Guide 2nd Edition," by Dan Haught and Jim Ferguson, Microsoft Press, 1997, ISBN 1-57231-342-0
For information on how to obtain the Microsoft Jet 2.0/Visual Basic 3.0 Compatibility Layer, please see the following KB article:
113951 HOWTO: Obtain/Distribute the Compatibility Layer in VB 3.0
You can find information about how to download the Jet 3.51 patch in the following Knowledge Base Article:
172733 ACC97: Updated Version of Microsoft Jet 3.5 Available on MSL
Keywords: kbinfo KB178880
