VS2015 now error C4477 "fprintf"

Question

Until now, VS compile my code perfectly, but now VS2015 show me a warning that I can't to understand.

My code:

 CString nombre=_T("Stack"), dsc=_T("overflow");
  _ftprintf(file, _T("%s %s);\n"), nombre, m_dsc);

and VS2015:

Warning C4477 'fwprintf' : format string '%s' requires an argument of type 'wchar_t *', but variadic argument 1 has type 'CString'

Why?, Why can't I use CString instead of wchart_t?. I want to use CString

Many thanks in advance

Josemi

Answer 1

_ftprintf(file, _T("%s %s);\n"), (LPCTSTR)nombre, (LPCTSTR)dsc);