Q141811: BUG: Problems w/ ODBC 32-bit Thunking Installer DLL in Win32s

Article: Q141811
Product(s): Open Database Connectivity (ODBC)
Version(s): WINDOWS:2.10
Operating System(s): 
Keyword(s): kbBug kbISS
Last Modified: 27-JUL-2001

2.10.2401
WINDOWS
kbinterop kbprg kbbug2.10

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

- Microsoft Open Database Connectivity, version 2.10 
-------------------------------------------------------------------------------

BUG#: 3187 (ODBCSDK2)

SYMPTOMS
========

When 32-bit ODBC applications that call the Installer API (ODBCCP32.DLL) are run
under the Win32s subsystem in a Windows for Workgroups (WFW) version 3.11
environment, the following error occurs:

  Initialization of a DLL failed, the process is terminating abnormally, cannot
  run program, unexpected error: 21.

WORKAROUND
==========

The application will run successfully if ODBCCP32.DLL is replaced with the
version of the DLL file from the ODBC 2.0 components (these components ship with
Visual C++ 2.0).

STATUS
======

Microsoft has confirmed this to be a problem in ODBCCP32.DLL (Thunking DLL)
version 2.10.2401. We are researching this problem and will post new information
here in the Microsoft Knowledge Base as it becomes available.

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

To reproduce this problem:

Build the following program to create a 32-bit EXE file (Add ODBC32.LIB and
ODBCCP32.LIB to the link libraries in projectsettings):

  #include <windows.h>
  #include <sql.h>
  #include <sqlext.h>
  #include <odbcinst.h>

  int WINAPI WinMain(HINSTANCE hinst,HINSTANCE pinst,LPSTR szCmd,int nShow)
  {
     if (SQLConfigDataSource(NULL,ODBC_ADD_DSN,
        "SQL Server","DSN=Oof\0Server=Oof\0\0"))
     {
        MessageBox(NULL,"SQLConfigDataSource succeeded",
           "SQLConfigDataSource",MB_OK);
     }
     else
     {
        MessageBox(NULL,"SQLConfigDataSource failed",
           "SQLConfigDataSource",MB_OK);
     }
     return 0;
  }

Install the Win32s subsystem from the Win32 SDK on a WFW 3.11 computer. Run the
program on Win32s with the ODBC 2.10a or 2.10b components (these ship with VC++
2.1,2.2, and 4.0). It will fail to load with a message that a DLL could not load
or something similar (depends on the version of Win32s).

Additional query words: 2.10.2401 Thunking DLL

======================================================================
Keywords          : kbBug kbISS 
Technology        : kbAudDeveloper kbODBCSearch
Version           : WINDOWS:2.10
Issue type        : kbbug

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

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