DOCUMENT:Q185992  21-MAY-1998  [vbwin]
TITLE   :PRB: "Wrong Version Of Run-Time DLL" When Starting Application
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER:WINDOWS:5.0
OPER/SYS:WINDOWS
KEYWORDS:

======================================================================
---------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Visual Basic Control Creation, Learning, Professional, and
   Enterprise Editions for Windows, version 5.0
---------------------------------------------------------------------

SYMPTOMS
========

When starting a Visual Basic 5.0 application, you might receive the
following error dialog box:

  Error
  "Wrong Version Of Run-Time DLL"

CAUSE
=====

The wrong version of the run-time file, Msvbvm50.dll, is installed on the
target machine.

RESOLUTION
==========

The most recent version of Msvbvm50.dll must be installed.

To resolve this problem, install a Visual Basic 5.0 application built using
the Application Setup Wizard onto the target machine, or manually copy the
most recent version of Msvbvm50.dll into the System directory (or System32
for NT machines) and register it using RegSvr32.Exe.

To register the run-time file manually, use RegSvr32.Exe (shipped on the
Visual Basic CD in the OS\System and Tools\RegUtils directories) as
demonstrated below:

1. On the Windows Start menu, click Run.

2. Type in the following and press ENTER:

      RegSvr32.Exe MSVBVM50.DLL

   You should see a message similar to the following:

      "DLLRegisterServer in C:\Windows\System\MSVBVM50.DLL succeeded"

3. If you do not see this message, please make sure you have the most
   recent version of Msvbvm50.dll and you have RegSvr32.Exe installed in
   the Windows System or System32 folder.

   NOTE: It is also possible to obtain all of the latest run-time files by
   installing the self extracting EXE referred to in the following
   Microsoft Knowledge Base article:

     ARTICLE-ID: Q180071
     TITLE     : FILE: Msvbvm50.exe Installs Visual Basic 5.0 Run-time
                 Files

STATUS
======

This behavior is by design.

MORE INFORMATION
================

The Application Setup Wizard should always be used to distribute your
Visual Basic 5.0 applications (or an equivalent third-party distribution
tool). This ensures that the necessary support files are brought along and
installed on the target system.


When compiling a Visual Basic program, the final output requires either the
run-time file that is installed upon the development system (or a more
recent run-time file). Older applications are not broken by newer versions
of the run-time file, but newer applications are broken by older versions
of the run-time file.

However, sometimes the wrong version Visual Basic 5.0 run-time file can
still be installed on a system and lead to the above error message. If the
NT Option 4.0 or Internet Information Server 4.0 is installed, there is the
chance that an older version of the run-time file will be installed.

There are currently two versions of the Visual Basic 5.0 run-time file:

     Run-Time File     Version           Ships With
     -------------------------------------------------------------------
     Msvbvm50.dll      5.00.3724         Visual Basic 5.0
                                         Visual Studio 97
                                         NT Option Pack 4.0
                                         Internet Information Server 4.0

     Msvbvm50.dll      05.00.4319 (SP2)  Visual Studio Service Pack 2
                                         Visual Studio Service Pack 3

If you have installed the most recent version of the Visual Basic 5.0 run-
time file, installing either the NT Option Pack 4 or Internet Information
Server 4.0 results in the older version of the run-time file replacing the
most recent version, and all Visual Basic 5.0 applications compiled under
Service Pack 2 or 3 will break.

Additional query words: kbDSupport kbdss kbAppSetup
======================================================================
Version           : WINDOWS:5.0
Platform          : WINDOWS
Issue type        : kbprb

=============================================================================

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Copyright Microsoft Corporation 1998.