try
Qt Code: 
  1. #ifdef _UNICODE
  2. #define _T(x)      L ## x
  3. #else /* _UNICODE */
  4. #define _T(x)      x
  5. #endif /* _UNICODE */
  6.  
  7.  
  8. QString::fromStdWString(_T("ΓΞΦ"))
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