Re: App Unicode call MBCS dll

From:
David Wilkinson <no-reply@effisols.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Tue, 26 Jun 2007 15:02:11 -0500
Message-ID:
<OI6NsRCuHHA.1496@TK2MSFTNGP06.phx.gbl>
MrAsm wrote:

On Tue, 26 Jun 2007 13:53:51 -0500, David Wilkinson
<no-reply@effisols.com> wrote:

Not even by having a .cpp file that opted out of the Unicode settings
for the rest of the application?


I did not test that...

But I don't know if it would be possible, in the same application, to
do something like this:

 - turn Unicode off (e.g. #undef UNICODE, _UNICODE etc.)
 - use CString (in ANSI mode)
 - turn Unicode on
 - use CString in Unicode mode

I don't know if it would be possible, and if it would be robust and
not cause bugs...


Asm:

I don't think you have to turn it back on in the same translation unit.
Just have one translation unit that operates entirely in MBCS. Something
like

<untested>
// wrapper.h
// C interface can be included anywhere
bool bWrapDameValorINI (char* valor, int nLen, const char* clave, const
char*variable, const char* nombre_ficheroINI, bool obligatorio);

//wrapper.cpp

#ifdef UNICODE
#undef UNICODE
#endif
#ifdef _UNICODE
#undef _UNICODE
#endif

#include <afx.h>
#include "dll_header.h"
#include "wrapper.h"

bool bWrapDameValorINI (char* valor, int nLen, const char* clave, const
char*variable, const char* nombre_ficheroINI, bool
obligatorio)
{
   CString strValor; // MBCS
   bool bResult = bDameValorINI (strValor, clave, variable,
                     nombre_ficheroINI, obligatorio); // DLL
   if(!bResult || nLen < strValor.Getlength())
   {
     return false;
   }
   strcpy(valor, strValor);
   return true;
}
</untested>

--
David Wilkinson
Visual C++ MVP

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