ADT95: Error Installing ADT Application with OLE Controls

• Microsoft Access Developer's Toolkit, version 7.0

SYMPTOMS

Moderate: Requires basic macro, coding, and interoperability skills.

When you run the Setup Wizard in Microsoft Access Developer's Toolkit version 7.0 to create Setup files for your custom application that contains OLE Controls, and then you run Setup for your application on another computer, you may receive the following error message:

   Mfc40.dll was unable to register itself in the system registry.

CAUSE

Your application's Setup files contain a mismatched version of the Msvcrt40.dll file. The size of the mismatched file is approximately 65 kilobytes, or 65,000 bytes. The size may vary slightly depending on the program that supplied it.

RESOLUTION

To work around this problem, follow these steps:

• Rename your existing Msvcrt40.dll file in the Windows System folder.
• Restore a compatible version of Msvcrt40.dll to the Windows System folder on your development computer from your original Microsoft Access for Windows 95 media.
• Rerun the Setup Wizard to create new Setup files.

  NOTE: In some circumstances, Msvcrt40.dll may be in use and you will not be able to rename it from within Microsoft Windows. If that happens, follow these steps:

• Restore the Msvcrt40.dll from the original Microsoft Access media to a temporary folder on your hard drive.
• Start your computer to an MS-DOS command prompt.
• Use the MS-DOS Rename command to rename the Msvcrt40.dll file in your Windows System folder.
• Move the restored Msvcrt40.dll file from its temporary folder to the Windows System folder.
• Restart your computer.

   Product              Media          Location     CAB File Name
   --------------------------------------------------------------

   Microsoft Office     Compact Disc   \OS\System   N/A
   Professional for
   Windows 95

   Microsoft Office     Diskettes      Disk 2       Msoff2.cab
   Professional for
   Windows 95

   Microsoft Access     Diskettes      Disk 2       Access2.cab
   for Windows 95

   ARTICLE-ID: Q132913
   TITLE     : How to Use EXTRACT.EXE to Copy Files from DMF Disks

MORE INFORMATION

When you run Setup for some software programs, such as Visual C++, ActiveX SDK, and Windows NT version 4.0, the program installs a smaller, debug version of Msvcrt40.dll on your computer. Because that version of the file is newer than the one included with Microsoft Office Professional for Windows 95 or Microsoft Access for Windows 95, the Setup program does not overwrite it if you reinstall Microsoft Access. You must restore the correct version of the file manually from the original media.

Msvcrt40.dll is one of three files you must include with the Setup files for your custom application if your application uses OLE custom controls. The other two files are Mfc40.dll and Olepro32.dll.

REFERENCES

For more information about incorrect versions of Msvcrt40.dll, please see the following articles in the Microsoft Knowledge Base:

   ARTICLE-ID: Q154591
   TITLE     : BUG: Wrong Version of MSVCRT40.DLL (Forwarder DLL) in
               Windows 95

   ARTICLE-ID: Q153733
   TITLE     : PRB: Wrong Mfc40.dll and Msvcrt40.dll from ActiveX CD-ROM
               Disc