string 转 LPCWSTR

virtual BOOL TextOut(
   int x,
   int y,
   LPCTSTR lpszString,
   int nCount
);
BOOL TextOut(
   int x,
   int y,
   const CString& str
);

WM_LBUTTONDOWN: {

hdc = BeginPaint(hWnd, &ps);

UINT x = lParam;

UINT y = wParam;

//LPSTR info;

//sprintf(info, "(%d, %d)", x, y);

std::string s1("( " + x);

std::string s2(" , ");

std::string s3(y + " )");

std::string str = s1 + s2 + s3;

TextOut(hdc, 50, 50,
(LPCWSTR)(str.c_str()), 6);

}

break;