DOCUMENT:Q141796 13-JUL-2001 [vbwin] TITLE :HOWTO: Identify the Jet Database Engine Components PRODUCT :Microsoft Visual Basic for Windows PROD/VER::4.0,5.0,6.0 OPER/SYS: KEYWORDS:kbfile kbJET kbMFC kbVBp400 kbVBp500 kbVBp600 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual Basic Learning Edition for Windows, versions 5.0, 6.0 - Microsoft Visual Basic Professional Edition for Windows, versions 5.0, 6.0 - Microsoft Visual Basic Enterprise Edition for Windows, versions 5.0, 6.0 - Microsoft Visual Basic Standard Edition, 32-bit, for Windows, version 4.0 - Microsoft Visual Basic Professional Edition, 16-bit, for Windows, version 4.0 - Microsoft Visual Basic Professional Edition, 32-bit, for Windows, version 4.0 - Microsoft Visual Basic Enterprise Edition, 16-bit, for Windows, version 4.0 - Microsoft Visual Basic Enterprise Edition, 32-bit, for Windows, version 4.0 ------------------------------------------------------------------------------- SUMMARY ======= 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. MORE INFORMATION ================ The list below displays which version of Jet is shipped with each of the following products: Application Microsoft JET version ---------------------------------------------------- Microsoft Access 1.0 1.0 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 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 3.5 Microsoft Excel 7.0 3.0 Microsoft Excel 97 3.5 Microsoft Project 2.0 Microsoft 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 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 3.5 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 ISAM 3.51 (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: Comlyr.exe (Visual Basic Compatibility Layer) (http://download.microsoft.com/download/access20/doc/1/WIN98/EN-US/Comlyr.exe) Accsvc.exe (Microsoft Access Service Pack) (http://download.microsoft.com/download/access20/SP/1/WIN98/EN-US/Accsvc.exe) For additional information about how to download Microsoft Support files, click the article number below to view the article in the Microsoft Knowledge Base: Q119591 How to Obtain Microsoft Support Files from Online Services Microsoft used the most current virus detection software available on the date of posting to scan this file for viruses. Once posted, the file is housed on secure servers that prevent any unauthorized changes to the file. REFERENCES ========== 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: Q113683 FILE: Fact Sheet on Jet 2.0/VB 3.0 Compatibility Layer Q122927 WX1124: Microsoft Access Version 2.0 Service Pack Q172733 Updated Version of Microsoft Jet 3.5 Available on MSL Additional query words: Comlyr Accsvc ====================================================================== Keywords : kbfile kbJET kbMFC kbVBp400 kbVBp500 kbVBp600 Technology : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB500Search kbVB600Search kbVB500 kbVB600 kbVB400Search kbVB400 kbVB16bitSearch Version : :4.0,5.0,6.0 Issue type : kbhowto ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.