ASCII strings to Unicode in C++

also since _bstr_t's have operator (char *) and operator (wchar_t *) if you have included comutil.h, you can use it to do your conversion.

char * source = "this is my source" ;
_bstr_t converter_temp(source) ;
wstring target ;
target = wstring(converter_temp) ;

... and the other way ...

std:string back_To_Mbcs = (char *) _bstr_t(target.c_str()) ;

I just wouldn't do it in a loop because we don't know if the _bstr_t implementation uses A2W() behing the scenes.