diff --git a/htdocs/admin/facture_situation.php b/htdocs/admin/facture_situation.php
index 91134671692..789faacacad 100644
--- a/htdocs/admin/facture_situation.php
+++ b/htdocs/admin/facture_situation.php
@@ -28,24 +28,91 @@
  */
 
 require '../main.inc.php';
+
+// Libraries
 require_once DOL_DOCUMENT_ROOT.'/core/lib/admin.lib.php';
-require_once DOL_DOCUMENT_ROOT.'/core/lib/pdf.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/invoice.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/compta/facture/class/facture.class.php';
+require_once DOL_DOCUMENT_ROOT.'/core/class/html.formsetup.class.php';
 
 // Load translation files required by the page
 $langs->loadLangs(array('admin', 'errors', 'other', 'bills'));
 
+// Initialize technical object to manage hooks of page. Note that conf->hooks_modules contains array of hook context
+$hookmanager->initHooks(array('situationinvoicesetup', 'globalsetup'));
+
+// Access control
 if (!$user->admin) {
 	accessforbidden();
 }
 
 $action = GETPOST('action', 'aZ09');
+$backtopage = GETPOST('backtopage', 'alpha');
+
 $value = GETPOST('value', 'alpha');
 $label = GETPOST('label', 'alpha');
 $scandir = GETPOST('scan_dir', 'alpha');
 $type = 'invoice';
 
+$form = new Form($db);
+$formSetup = new FormSetup($db);
+
+
+// Setup conf MYMODULE_MYPARAM4 : exemple of quick define write style
+$formSetup->newItem('INVOICE_USE_SITUATION')
+	->setAsYesNo()
+	->nameText = $langs->trans('UseSituationInvoices');
+
+$item = $formSetup->newItem('INVOICE_USE_SITUATION_CREDIT_NOTE')
+	->setAsYesNo()
+	->nameText = $langs->trans('UseSituationInvoicesCreditNote');
+
+//$item = $formSetup->newItem('INVOICE_USE_RETAINED_WARRANTY')
+//	->setAsYesNo()
+//	->nameText = $langs->trans('Retainedwarranty');
+
+
+$item = $formSetup->newItem('INVOICE_USE_RETAINED_WARRANTY');
+$item->nameText = $langs->trans('AllowedInvoiceForRetainedWarranty');
+
+$arrayAvailableType = array(
+	Facture::TYPE_SITUATION => $langs->trans("InvoiceSituation"),
+	Facture::TYPE_STANDARD.'+'.Facture::TYPE_SITUATION => $langs->trans("InvoiceSituation").' + '.$langs->trans("InvoiceStandard"),
+);
+
+if ($action == 'edit') {
+	$item->fieldInputOverride = $form->selectarray('INVOICE_USE_RETAINED_WARRANTY', $arrayAvailableType, $conf->global->INVOICE_USE_RETAINED_WARRANTY, 1);
+} else {
+	$item->fieldOutputOverride= isset($arrayAvailableType[$conf->global->INVOICE_USE_RETAINED_WARRANTY])?$arrayAvailableType[$conf->global->INVOICE_USE_RETAINED_WARRANTY]:'';
+}
+
+//$item = $formSetup->newItem('INVOICE_RETAINED_WARRANTY_LIMITED_TO_SITUATION')->setAsYesNo();
+//$item->nameText = $langs->trans('RetainedwarrantyOnlyForSituation');
+
+$formSetup->newItem('INVOICE_RETAINED_WARRANTY_LIMITED_TO_FINAL_SITUATION')
+	->setAsYesNo()
+	->nameText = $langs->trans('RetainedwarrantyOnlyForSituationFinal');
+
+
+$item = $formSetup->newItem('INVOICE_SITUATION_DEFAULT_RETAINED_WARRANTY_PERCENT');
+$item->nameText = $langs->trans('RetainedwarrantyDefaultPercent');
+$item->fieldAttr = array(
+	'type' => 'number',
+	'step' => '0.01',
+	'min' => 0,
+	'max' => 100
+);
+
+
+// Conditions paiements
+$item = $formSetup->newItem('INVOICE_SITUATION_DEFAULT_RETAINED_WARRANTY_COND_ID');
+$item->nameText = $langs->trans('PaymentConditionsShortRetainedWarranty');
+$form->load_cache_conditions_paiements();
+if (!empty($conf->global->INVOICE_SITUATION_DEFAULT_RETAINED_WARRANTY_COND_ID) && isset($form->cache_conditions_paiements[$conf->global->INVOICE_SITUATION_DEFAULT_RETAINED_WARRANTY_COND_ID]['label'])) {
+	$item->fieldOutputOverride = $form->cache_conditions_paiements[$conf->global->INVOICE_SITUATION_DEFAULT_RETAINED_WARRANTY_COND_ID]['label'];
+}
+$item->fieldInputOverride = $form->getSelectConditionsPaiements($conf->global->INVOICE_SITUATION_DEFAULT_RETAINED_WARRANTY_COND_ID, 'INVOICE_SITUATION_DEFAULT_RETAINED_WARRANTY_COND_ID', -1, 1);
+
 
 /*
  * Actions
@@ -67,7 +134,6 @@ llxHeader(
 	'EN:Invoice_Configuration|FR:Configuration_module_facture|ES:ConfiguracionFactura'
 );
 
-$form = new Form($db);
 
 
 $linkback = '<a href="'.DOL_URL_ROOT.'/admin/modules.php?restore_lastsearch_values=1">'.$langs->trans("BackToModuleList").'</a>';
@@ -84,170 +150,25 @@ print '<span class="opacitymedium">'.$langs->trans("InvoiceFirstSituationDesc").
  *  Numbering module
  */
 
-print '<form method="POST" action="'.$_SERVER['PHP_SELF'].'">';
-print '<input type="hidden" name="token" value="'.newToken().'">';
+if ($action == 'edit') {
+	print $formSetup->generateOutput(true);
+} else {
+	print $formSetup->generateOutput();
+}
 
+if (count($formSetup->items) > 0) {
+	if ($action != 'edit') {
+		print '<div class="tabsAction">';
+		print '<a class="butAction" href="'.$_SERVER["PHP_SELF"].'?action=edit&token='.newToken().'">'.$langs->trans("Modify").'</a>';
+		print '</div>';
+	}
+} else {
+	print '<br>'.$langs->trans("NothingToSetup");
+}
 
-print '<div class="div-table-responsive-no-min">'; // You can use div-table-responsive-no-min if you dont need reserved height for your table
-print '<table class="noborder centpercent">';
-
-print '<tr class="liste_titre">';
-print '<td>'.$langs->trans("Parameter").'</td>';
-print '<td align="center" width="60">'.$langs->trans("Value").'</td>';
-print '<td width="80">&nbsp;</td>';
-print "</tr>\n";
-
-_printOnOff('INVOICE_USE_SITUATION', $langs->trans('UseSituationInvoices'));
-_printOnOff('INVOICE_USE_SITUATION_CREDIT_NOTE', $langs->trans('UseSituationInvoicesCreditNote'));
-//_printOnOff('INVOICE_USE_RETAINED_WARRANTY', $langs->trans('Retainedwarranty'));
-
-$confkey = 'INVOICE_USE_RETAINED_WARRANTY';
-
-$arrayAvailableType = array(
-	Facture::TYPE_SITUATION => $langs->trans("InvoiceSituation"),
-	Facture::TYPE_STANDARD.'+'.Facture::TYPE_SITUATION => $langs->trans("InvoiceSituation").' + '.$langs->trans("InvoiceStandard"),
-);
-$selected = $conf->global->$confkey;
-$curentInput = (empty($inputCount) ? 1 : ($inputCount + 1));
-$formSelectInvoiceType = $form->selectarray('value'.$curentInput, $arrayAvailableType, $selected, 1);
-_printInputFormPart($confkey, $langs->trans('AllowedInvoiceForRetainedWarranty'), '', array(), $formSelectInvoiceType);
-
-//_printOnOff('INVOICE_RETAINED_WARRANTY_LIMITED_TO_SITUATION', $langs->trans('RetainedwarrantyOnlyForSituation'));
-_printOnOff('INVOICE_RETAINED_WARRANTY_LIMITED_TO_FINAL_SITUATION', $langs->trans('RetainedwarrantyOnlyForSituationFinal'));
-
-$metas = array(
-	'type' => 'number',
-	'step' => '0.01',
-	'min' => 0,
-	'max' => 100
-);
-_printInputFormPart('INVOICE_SITUATION_DEFAULT_RETAINED_WARRANTY_PERCENT', $langs->trans('RetainedwarrantyDefaultPercent'), '', $metas);
-
-// Conditions paiements
-$inputCount = empty($inputCount) ? 1 : ($inputCount + 1);
-print '<tr class="oddeven">';
-print '<td>'.$langs->trans('PaymentConditionsShortRetainedWarranty').'</td>';
-print '<td class="center" width="20">&nbsp;</td>';
-print '<td class="right" width="300">';
-print '<input type="hidden" name="param'.$inputCount.'" value="INVOICE_SITUATION_DEFAULT_RETAINED_WARRANTY_COND_ID">';
-$form->select_conditions_paiements($conf->global->INVOICE_SITUATION_DEFAULT_RETAINED_WARRANTY_COND_ID, 'value'.$inputCount, -1, 1);
-print '</td></tr>';
-
-
-print '</table>';
-print '</div>';
-
-print '<br>';
-
-_updateBtn();
-
-print '</form>';
 
 print dol_get_fiche_end();
 
 // End of page
 llxFooter();
 $db->close();
-
-/**
- * Print an update button
- *
- * @return void
- */
-function _updateBtn()
-{
-	global $langs;
-	print '<div class="center">';
-	print '<input type="submit" class="button button-save" value="'.$langs->trans("Save").'">';
-	print '</div>';
-}
-
-/**
- * Print a On/Off button
- *
- * @param string $confkey the conf key
- * @param bool   $title   Title of conf
- * @param string $desc    Description
- *
- * @return void
- */
-function _printOnOff($confkey, $title = false, $desc = '')
-{
-	global $langs;
-
-	print '<tr class="oddeven">';
-	print '<td>'.($title ? $title : $langs->trans($confkey));
-	if (!empty($desc)) {
-		print '<br><small>'.$langs->trans($desc).'</small>';
-	}
-	print '</td>';
-	print '<td class="center" width="20">&nbsp;</td>';
-	print '<td class="right" width="300">';
-	print ajax_constantonoff($confkey);
-	print '</td></tr>';
-}
-
-
-/**
- * Print a form part
- *
- * @param string $confkey the conf key
- * @param bool   $title   Title of conf
- * @param string $desc    Description of
- * @param array  $metas   html meta
- * @param string $type    type of input textarea or input
- * @param bool   $help    help description
- *
- * @return void
- */
-function _printInputFormPart($confkey, $title = false, $desc = '', $metas = array(), $type = 'input', $help = false)
-{
-	global $langs, $conf, $db, $inputCount;
-
-	$inputCount = empty($inputCount) ? 1 : ($inputCount + 1);
-	$form = new Form($db);
-
-	$defaultMetas = array(
-		'name' => 'value'.$inputCount
-	);
-
-	if ($type != 'textarea') {
-		$defaultMetas['type']   = 'text';
-		$defaultMetas['value']  = $conf->global->{$confkey};
-	}
-
-
-	$metas = array_merge($defaultMetas, $metas);
-	$metascompil = '';
-	foreach ($metas as $key => $values) {
-		$metascompil .= ' '.$key.'="'.$values.'" ';
-	}
-
-	print '<tr class="oddeven">';
-	print '<td>';
-
-	if (!empty($help)) {
-		print $form->textwithtooltip(($title ? $title : $langs->trans($confkey)), $langs->trans($help), 2, 1, img_help(1, ''));
-	} else {
-		print $title ? $title : $langs->trans($confkey);
-	}
-
-	if (!empty($desc)) {
-		print '<br><small>'.$langs->trans($desc).'</small>';
-	}
-
-	print '</td>';
-	print '<td class="center" width="20">&nbsp;</td>';
-	print '<td class="right" width="300">';
-	print '<input type="hidden" name="param'.$inputCount.'" value="'.$confkey.'">';
-	print '<input type="hidden" name="action" value="setModuleOptions">';
-	if ($type == 'textarea') {
-		print '<textarea '.$metascompil.'  >'.dol_htmlentities($conf->global->{$confkey}).'</textarea>';
-	} elseif ($type == 'input') {
-		print '<input '.$metascompil.'  />';
-	} else {
-		// custom
-		print $type;
-	}
-	print '</td></tr>';
-}
diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index 88fca7b536a..05c235f5f51 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -3896,7 +3896,7 @@ class Form
 
 	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
 	/**
-	 *      Return list of payment modes.
+	 *      print list of payment modes.
 	 *      Constant MAIN_DEFAULT_PAYMENT_TERM_ID can used to set default value but scope is all application, probably not what you want.
 	 *      See instead to force the default value by the caller.
 	 *
@@ -3911,8 +3911,28 @@ class Form
 	public function select_conditions_paiements($selected = 0, $htmlname = 'condid', $filtertype = -1, $addempty = 0, $noinfoadmin = 0, $morecss = '')
 	{
 		// phpcs:enable
-		global $langs, $user, $conf;
+		print $this->getSelectConditionsPaiements($selected, $htmlname, $filtertype, $addempty, $noinfoadmin, $morecss);
+	}
 
+
+	/**
+	 *      Return list of payment modes.
+	 *      Constant MAIN_DEFAULT_PAYMENT_TERM_ID can used to set default value but scope is all application, probably not what you want.
+	 *      See instead to force the default value by the caller.
+	 *
+	 *      @param	int		$selected		Id of payment term to preselect by default
+	 *      @param	string	$htmlname		Nom de la zone select
+	 *      @param	int		$filtertype		Not used
+	 *		@param	int		$addempty		Add an empty entry
+	 * 		@param	int		$noinfoadmin	0=Add admin info, 1=Disable admin info
+	 * 		@param	string	$morecss		Add more CSS on select tag
+	 *		@return	void
+	 */
+	public function getSelectConditionsPaiements($selected = 0, $htmlname = 'condid', $filtertype = -1, $addempty = 0, $noinfoadmin = 0, $morecss = '')
+	{
+
+		global $langs, $user, $conf;
+		$out = '';
 		dol_syslog(__METHOD__." selected=".$selected.", htmlname=".$htmlname, LOG_DEBUG);
 
 		$this->load_cache_conditions_paiements();
@@ -3922,24 +3942,25 @@ class Form
 			$selected = $conf->global->MAIN_DEFAULT_PAYMENT_TERM_ID;
 		}
 
-		print '<select id="'.$htmlname.'" class="flat selectpaymentterms'.($morecss ? ' '.$morecss : '').'" name="'.$htmlname.'">';
+		$out.=  '<select id="'.$htmlname.'" class="flat selectpaymentterms'.($morecss ? ' '.$morecss : '').'" name="'.$htmlname.'">';
 		if ($addempty) {
-			print '<option value="0">&nbsp;</option>';
+			$out.=  '<option value="0">&nbsp;</option>';
 		}
 		foreach ($this->cache_conditions_paiements as $id => $arrayconditions) {
 			if ($selected == $id) {
-				print '<option value="'.$id.'" selected>';
+				$out.=  '<option value="'.$id.'" selected>';
 			} else {
-				print '<option value="'.$id.'">';
+				$out.=  '<option value="'.$id.'">';
 			}
-			print $arrayconditions['label'];
-			print '</option>';
+			$out.=  $arrayconditions['label'];
+			$out.=  '</option>';
 		}
-		print '</select>';
+		$out.=  '</select>';
 		if ($user->admin && empty($noinfoadmin)) {
-			print info_admin($langs->trans("YouCanChangeValuesForThisListFromDictionarySetup"), 1);
+			$out.=  info_admin($langs->trans("YouCanChangeValuesForThisListFromDictionarySetup"), 1);
 		}
-		print ajax_combobox($htmlname);
+		$out.=  ajax_combobox($htmlname);
+		return $out;
 	}