You receive a "file.obj : error LNK2001: unresolved external" error message when building an application (191663)

The information in this article applies to:

Microsoft Windows CE Toolkit for Visual C++ 6.0
Microsoft Windows CE Embedded Toolkit for Visual C++ 5.0
Microsoft Windows CE Platform Builder 2.11

This article was previously published under Q191663

SYMPTOMS

Building an application results in one or more of the following errors:

   file.obj : error LNK2001: unresolved external
        symbol "const  type_info::`vftable'" (??_7type_info@@6B@)

   file.obj : error LNK2001: unresolved external
        symbol __CxxThrowException

CAUSE

This product does not currently support C++ exception handling or run-time Type Information.

RESOLUTION

Remove all references to C++ exception handling from the project. These include:

/GX switch
/GR switch
Use of catch-and-throw keywords

STATUS

This behavior is by design.

Note Microsoft Windows CE Toolkit for Visual C++ 6.0 now generates warning C4531 when compiling for Windows CE version 2.10 and later.

MORE INFORMATION

Steps to reproduce the behavior

The following example generates the previously mentioned errors when built for a Windows CE target platform:

   #include <windows.h>

   int WINAPI WinMain(
       HINSTANCE hInstance,
       HINSTANCE hPrevInstance,
       LPTSTR lpCmdLine,
       int nCmdShow )
{
  throw 1;
  return 0;
}

Modification Type:	Major	Last Reviewed:	9/1/2005
Keywords:	kberrmsg kbtshoot kbCPPonly kbprb KB191663 kbAudDeveloper