nRootKey = HKEY_LOCAL_MACHINE;
    szKey = "Software\\Microsoft\\Windows\\CurrentVersion\\Run";
    szKeyName = "EMSoftVersion";
RegDBSetDefaultRoot (nRootKey);    //注册表置根为nRootKey 
              res = RegDBSetKeyValueEx(szKey,szKeyName,REGDB_STRING,svSerial,-1);
            if(res < 0) then 
                MessageBox("安装程序出错！\r\n错误：向注册表写入数据失败!", WARNING);    //注册失败
                goto Dlg_SdRegisterUserEx; 
            else    
                res = RegDBSetKeyValueEx(szKey,szKeyName3,REGDB_STRING,nValue,-1);
                MessageBox ("注册成功!", INFORMATION);
            endif;