_wfopen memory leak?

Hi,

I'm using boundschecker to search for memory leaks. It gives a leak on this (now isolated) code fragment in a win32 app (C++, Microsoft Visual Studio 2005 pro, sp1, XP pro):

case IDC_TEST:
{
      FILE* l_InputFile;
      l_InputFile = _wfopen(TEXT("C:\\Test.txt"), TEXT("rt"));
      int l_Result = fclose(l_InputFile);
}
break;

There is very little going on, i press a button, a file Test.txt is opened and closed. Yet, boundschecker gives tons of warnings (after exiting the program), like:

Memory Leak, Leak exiting program
_mtinitlocknum            mlock.c             279
_getstream                 stream.c             71
_wfsopen                  fopen.c               61
wfopen                      fopen.c             124
MainDialogProcedure winmain.cpp     112

and

Resource Leak, Kernel 32, InitializeCriticalSectionAndSpinCount
__crtInitCritSecAndSpinCount     initcrit.c    161
__alloc_osfhnd                            osfinfo.c   93
tsopen_nolock                             open.c     385
_wsopen_helper                         open.c     170
_wsopen_s                                 open.c     910

These errors all seem to originate from the _wfopen() call, when i run the program without executing this code fragment, no leaks occur.

Anyone has suggestions what the problem might be?

Kind Regards,
Daniel Dekkers