Hi. I needed some std::string <-> std::wstring conversion and after searching web for something like this found nothing except a thread with this name here on boost. So I made one myself, maybe if you think is worth something you will include it in boost. Here is the code: template<class _RetString,class _SourceString> _RetString string_cast(const _SourceString &src,std::locale Loc=std::locale()) { _RetString dst; typedef _SourceString::value_type _SrcValType; typedef _RetString::value_type _DstValType; typedef std::codecvt<_SrcValType,_DstValType,mbstate_t> CodeCvt; const CodeCvt & cvt= use_facet<CodeCvt>(Loc); std::mbstate_t state = std::mbstate_t(); _SrcValType * next_in=NULL; _DstValType *next_out=NULL; dst.resize(src.size()); while(true) { switch(cvt.out(state, src.c_str(), src.c_str() + src.size(),next_in,const_cast<_DstValType *>(dst.c_str()),const_cast<_DstValType *>(dst.c_str())+dst.size(), next_out)) { case std::codecvt_base::ok: case std::codecvt_base::partial: case std::codecvt_base::error: // not much we can do here but guess: case std::codecvt_base::noconv: return dst; } } return dst; } and I used like this: std::string strA = string_cast<std::string>( std::wstring(L"dummy example") ); Bobby __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com