function tools($kuerzel, $get, &$conf = '')
 {
     $dbSuche = t3lib_div::makeInstance('tx_he_tools_lib_db_suche');
     switch ($kuerzel) {
         case 'CONTENTELEMENT':
             $uid = $get['uid'];
             $out = tx_he_tools_util::renderContentElem($this->cObj, $uid);
             break;
         case 'HOCHSCHULE_A_BIS_Z':
             $eingabe = $get['eingabe'];
             $buchstabe = $get['buchstabe'];
             $out = $dbSuche->hochschuleABisZSucheContent($this, $eingabe, $buchstabe);
             break;
         case 'ABFALL_A_BIS_Z':
             $eingabe = $get['eingabe'];
             $buchstabe = $get['buchstabe'];
             $out = $dbSuche->abfallABisZSucheContent($this, $eingabe, $buchstabe);
             break;
         case "CAL_EXPORT":
             $calexport = new tx_he_tools_calexport($this->extKey);
             $out = $calexport->main();
             break;
         case "FLINC":
             $out = tx_he_tools_rz_skripte::flinc();
             break;
         case 'WER_MACHT_WAS_A_BIS_Z':
             $eingabe = $get['eingabe'];
             $buchstabe = $get['buchstabe'];
             $out = $dbSuche->werMachtWasABisZSucheContent($this, $eingabe, $buchstabe);
             break;
         case 'GOOGLE_MAPS':
             $url = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'iframe_url', 'settings');
             $hoehe = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'iframe_hoehe', 'settings');
             $out = tx_he_tools_util::renderIframe($url, $hoehe);
             break;
         case 'INFOSCREEN':
             $GLOBALS["TSFE"]->set_no_cache();
             $app = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_app', 'settings');
             $infoscreenDelay = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_delay', 'settings');
             $delay = $infoscreenDelay * 1000;
             $infoscreenForceReload = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_force_reload', 'settings');
             $reload = $infoscreenForceReload * 60;
             $app = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_app', 'settings');
             $infoScreen = t3lib_div::makeInstance('tx_he_tools_infoscreen', $this->cObj, $delay, $reload);
             if ($app == 'MAIN') {
                 return $infoScreen->redirectMain();
             } else {
                 if ($app == 'VIDEO') {
                     $videoDatei = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_video', 'settings');
                     return $infoScreen->zeigeVideo($videoDatei);
                 } else {
                     if ($app == 'UEBERSICHT') {
                         $GLOBALS["TSFE"]->set_no_cache();
                         return $infoScreen->zeigeUebersichtsSeite();
                     } else {
                         if ($app == 'SEITENINHALT') {
                             $dauerAnzeige = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_cal_daueranzeige', 'settings');
                             $dauerUebergang = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_cal_daueruebergang', 'settings');
                             $sponsoren = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_sponsoren', 'settings');
                             $gebaeude = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_gebaeude', 'settings');
                             $ttContentId = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_seiteninhalt', 'settings');
                             return $infoScreen->zeigeSeitenInhalt($ttContentId, $dauerAnzeige * 1000, $dauerUebergang * 1000, $sponsoren, $gebaeude);
                         } else {
                             if ($app == 'SEITENINHALT_LISTE') {
                                 $dauerAnzeige = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_cal_daueranzeige', 'settings');
                                 $dauerUebergang = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_cal_daueruebergang', 'settings');
                                 $sponsoren = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_sponsoren', 'settings');
                                 $gebaeude = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_gebaeude', 'settings');
                                 $standardText = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_standard_anzeigetext', 'settings');
                                 $ttContentPid = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_seiteninhalt_seite', 'settings');
                                 return $infoScreen->zeigeSeitenInhaltListe($ttContentPid, $dauerAnzeige * 1000, $dauerUebergang * 1000, $sponsoren, $gebaeude, $standardText);
                             } else {
                                 if ($app == 'FLEXIBEL') {
                                     $standardmeldung = 'Herzlich willkommen an der Hochschule Esslingen';
                                     $dauerAnzeige = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_cal_daueranzeige', 'settings');
                                     $dauerUebergang = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_cal_daueruebergang', 'settings');
                                     $sponsoren = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_sponsoren', 'settings');
                                     $gebaeude = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_gebaeude', 'settings');
                                     $standort = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_standort', 'settings');
                                     $elemente = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_elemente', 'settings');
                                     return $infoScreen->zeigeFlexiblenInhalt($standardmeldung, $elemente, $dauerAnzeige * 1000, $dauerUebergang * 1000, $sponsoren, $gebaeude, $standort);
                                 } else {
                                     $standardmeldung = 'Herzlich willkommen an der Hochschule Esslingen';
                                     $category = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_cal_cat', 'settings');
                                     $dauerAnzeige = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_cal_daueranzeige', 'settings');
                                     $dauerUebergang = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_cal_daueruebergang', 'settings');
                                     $sponsoren = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_sponsoren', 'settings');
                                     $gebaeude = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_gebaeude', 'settings');
                                     $standort = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'infoscreen_standort', 'settings');
                                     return $infoScreen->zeigeKalendertermine($category, $standardmeldung, $dauerAnzeige * 1000, $dauerUebergang * 1000, $sponsoren, $gebaeude, $standort);
                                 }
                             }
                         }
                     }
                 }
             }
             break;
         case 'CAMPUS_LEBEN':
             $imgLink = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'campus_leben_imglink', 'settings');
             $link = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'campus_leben_link', 'settings');
             $email = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'campus_leben_email', 'settings');
             return tx_he_tools_rz_skripte::campusLeben($link, $imgLink, $email);
             break;
         case 'VERANSTALTUNGEN':
             $funktion = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'veranstaltungen', 'settings');
             $out = $this->veranstaltungen($funktion, $conf, $get);
             break;
         case 'KMS_ANTRAG':
             $GLOBALS["TSFE"]->set_no_cache();
             $kmsFormular = t3lib_div::makeInstance('tx_he_tools_kms_formular');
             $out = $kmsFormular->formularAnzeigen();
             break;
         case 'GASTKENNUNG_BEANTRAGEN':
             $GLOBALS["TSFE"]->set_no_cache();
             /** @var tx_he_tools_gast_kennungen $gastFormular */
             $gastFormular = t3lib_div::makeInstance('tx_he_tools_gast_kennungen');
             $out = $gastFormular->formularAnzeigen();
             break;
         case 'GASTKENNUNG_VERWALTEN':
             $GLOBALS["TSFE"]->set_no_cache();
             /** @var tx_he_tools_gast_kennungen $gastFormular */
             $gastFormular = t3lib_div::makeInstance('tx_he_tools_gast_kennungen');
             $out = $gastFormular->kennungenVerwalten();
             break;
         case 'RZ_EINFUEHRUNG_ANMELDUNG':
             $einfuehrungAnmeldungen = t3lib_div::makeInstance('tx_he_tools_einfuehrung_anmeldungen');
             $out = $einfuehrungAnmeldungen->main();
             break;
         case 'HTACCESS_HILFE':
             $out = tx_he_tools_util::htaccessErzeugen();
             break;
         case 'MENSA_SPEISEPLAN':
             $mensa = t3lib_div::makeInstance('tx_he_tools_mensa');
             $out = $mensa->zeigeMensaDaten($this);
             break;
         case 'SPEZIAL':
             $spezialFunktion = t3lib_div::makeInstance('tx_he_tools_spezialfunktionen');
             $funktion = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'spezialfunktionen', 'settings');
             return $spezialFunktion->main($funktion);
             break;
         case 'SHIB_LOGIN_REDIRECT':
             $anzeigeText = $this->pi_getFFvalue($this->cObj->data['pi_flexform'], 'login_anzeigetext', 'settings');
             return tx_he_tools_rz_skripte::erzeugeShibLoginMitRedirect($anzeigeText);
             break;
         case 'SHOW_BROWSERINFO':
             return tx_he_tools_rz_skripte::showBrowserInfo();
         case 'SHOP_ROEM_GESCHENKE':
             return tx_he_tools_rz_skripte::roemGeschenke($this->cObj);
         case 'GU_QR_ADMIN':
             $GLOBALS["TSFE"]->set_no_cache();
             $guQrAdmin = t3lib_div::makeInstance('tx_he_tools_gu_qr_admin');
             return $guQrAdmin->main($this->cObj, $get);
         default:
             $out = '<h3>noch nicht implementiert : ' . $kuerzel . '</h3>';
     }
     return $out;
 }