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

• 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).