VC中如何格式化COLORREF為#FFFFFF字符串

int iRed = GetRValue(m_cColor);
            int iGreen = GetGValue(m_cColor);
            int iBlue = GetBValue(m_cColor);
            CString szColor;
            szColor.Format(_T("#%02X%02X%02X"), iRed, iGreen, iBlue);