编程错误求高手帮助

TCHAR *pszFileName=_T("d:\\myfile.txt");
    CStdioFile myFile;
    CFileException fileException;
    if(!myFile.Open(pszFileName,CFile::modeCreate|CFile::typeText|CFile::modeReadWrite),&fileException)
    {
        
        TCHAR str=_T("acxsada\n");
        myFile.WriteString(str);
        CString strOrder;
        strOrder.Format("%d,%.3f",66,88.88);
        myFile.WriteString(strOrder);
    }

error C2440: “初始化”: 无法从“const wchar_t [9]”转换为“TCHAR”