DOCUMENT:Q168449 17-JUL-2001 [visualc] TITLE :PRB: Use of Data-Bound Controls Is Version Dependent PRODUCT :Microsoft C Compiler PROD/VER:4.2 4.20b 5.0 OPER/SYS: KEYWORDS:kbDAOsearch kbDatabase kbMFC kbODBC kbVC kbVC420 kbVC500 kbprb ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual C++, 32-bit Enterprise Edition, versions 4.2, 5.0, 4.2b - Microsoft Visual C++, 32-bit Professional Edition, versions 4.2, 5.0, 4.2b ------------------------------------------------------------------------------- SYMPTOMS ======== Loading Visual C++ 5.0 on a system that has Visual C++ 4.x installed will cause numerous DLLs, OCXs, and other components to be overwritten. One set of components that is updated are the data-bound controls. - DBGrid - DBListBox - DBComboBox - Remote Data Control Although it is possible to load Visual C++ 4.x and 5.0 on the same system in different directories, Visual C++ 4.x will have trouble displaying the data-bound controls properties. Displaying the "All" Tab on Database Controls such as Microsoft Data Combo and Microsoft Masked Edit Box shows after having installed Visual C++ 5.0. Normally, you will see Datasource, field properties, etc. CAUSE ===== Visual C++ 5.0 installs upgrades of the data-bound controls that have the same file names as the versions that ship with Visual C++ 4.x. RESOLUTION ========== If you want to work with Visual C++ 4.2, replace the appropriate controls in your system32 from the version 4.2 redist\ocx directory (in this case, MSMASK32.OCX DBLIST32.OCX). The Property Dialog Headings for these controls have also changed to Microsoft DBCombo, version 5.0 and Microsoft Masked Edit Box version 5, rather than Microsoft DBCombo and Microsoft Masked Edit Box. Creating a new project exhibits the same problem. This makes is somewhat difficult to use these controls. There are three controls that have the same name as the previous version and therefore overwrite the version that works with version 4.2: - DBGrid32.ocx - DBList32.ocx - MSMask32.ocx STATUS ====== This behavior is by design. MORE INFORMATION ================ It is not possible to work with version 5.0 data-bound controls in Visual C++ 4.x or with version 4.x data-bound controls in Visual C++ 5.0. The data-bound controls have been changed in these two versions. It is highly recommended that you chose between versions 4.2 or 5.0 when working with database applications that use the data-bound controls. Although this is problem in the design interface, the newer 5.0 controls can be used by older 4.2 applications at run time. REFERENCES ========== Vcread.htm that ships with Visual C++ 5.0 Additional query words: run-time ====================================================================== Keywords : kbDAOsearch kbDatabase kbMFC kbODBC kbVC kbVC420 kbVC500 kbprb Technology : kbVCsearch kbAudDeveloper kbVC420 kbVC500 kbVC32bitSearch kbVC420b kbVC500Search Version : 4.2 4.20b 5.0 Issue type : kbprb ============================================================================= 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.