PRB: Wrong Mfc40.dll and Msvcrt40.dll from ActiveX CD-ROM Disc

• Microsoft Visual C++, 32-bit Edition, versions 4.1, 4.2

SYMPTOMS

Some applications written using Visual C++ 4.1 or 4.2 may break as a result of installing the beta version of the ActiveX Development Kit.

CAUSE

When you run setup (Setupsdk.exe) from the \Msdnsmpl\Tools\Inetsdk\ directory of the Internet SDK on the beta version of the ActiveX Development Kit, the CD-ROM installs the Visual C++ version 4.0 Mfc40.dll and Msvcrt40.dll. These overwrite any newer versions of these files that may already be installed, so they may break some applications already built with Visual C++ 4.1 or 4.2.

The size, version and date of the wrong version files installed in the Windows\System directory are:

Mfc40.dll     923,408 bytes  Ver. 4.0.5277  date 4/3/96

You can check these file properties from Windows NT File Manager or Windows 95 Explorer.

The Readme.txt file in the \Msdnsmpl\Tools\Inetsdk\Inetsdk\ directory of the beta ActiveX Developmant Kit CD-ROM has a date of 4/3/96 and file size of 16,649 bytes. Later versions of ActiveX Development Kit will have a later date and different size for this file.

The correct size and version of the files in Visual C++ version 4.1 are:

Mfc40.dll     921,872 bytes  Ver. 4.1.6038

The correct size and version of the files in Visual C++ version 4.2 are:

Mfc40.dll     921,872 bytes  Ver. 4.1.6038
Msvcrt40.dll   65,024 bytes  Ver. 4.2000.6164

RESOLUTION

To correct the problem, copy these two files from the \Redist directory of the Visual C++ 32-bit Edition CD-ROM to the Windows 95 \System directory (or Windows NT \System32), or, download and install the latest version of ActiveX INETSDK which is available from the following Web site:

http://www.microsoft.com/intdev/sdk/

NOTE: This article does not apply to Visual C++ versions 5.x and above.