diff --git a/gulliver/system/class.xmlformTemplate.php b/gulliver/system/class.xmlformTemplate.php
index 4337ec002..8b75f3af4 100644
--- a/gulliver/system/class.xmlformTemplate.php
+++ b/gulliver/system/class.xmlformTemplate.php
@@ -1,4 +1,7 @@
 <?php
+
+use ProcessMaker\Core\AppEvent;
+
 /**
  * Class xmlformTemplate
  *
@@ -350,6 +353,10 @@ class xmlformTemplate extends Smarty
         //(with the method "printTemplate") and painting takes less than 1 second
         //so the new template resource generally will had the same timestamp.
         $output = $this->fetch ( 'mem:defaultTemplate' . $form->name );
+        $output = AppEvent::getAppEvent()
+                ->setHtml($output)
+                ->dispatch(AppEvent::XMLFORM_RENDER, $form)
+                ->getHtml();
         return $output;
     }
 
diff --git a/workflow/engine/src/ProcessMaker/Core/AppEvent.php b/workflow/engine/src/ProcessMaker/Core/AppEvent.php
new file mode 100644
index 000000000..40e983945
--- /dev/null
+++ b/workflow/engine/src/ProcessMaker/Core/AppEvent.php
@@ -0,0 +1,96 @@
+<?php
+
+namespace ProcessMaker\Core;
+
+class AppEvent
+{
+    /**
+     * Identify XML Form type elements
+     */
+    const XMLFORM_RENDER = 0;
+
+    /**
+     * Represents the AppEvent object.
+     * 
+     * @var object 
+     */
+    private static $appEvent = null;
+
+    /**
+     * List of closure elements.
+     * 
+     * @var array 
+     */
+    private $callbacks = [];
+
+    /**
+     * Represents the html string.
+     * 
+     * @var string 
+     */
+    private $html = null;
+
+    /**
+     * Get an AppEvent object.
+     * 
+     * @return object
+     */
+    public static function getAppEvent()
+    {
+        if (self::$appEvent === null) {
+            self::$appEvent = new AppEvent();
+        }
+        return self::$appEvent;
+    }
+
+    /**
+     * Process all closure elements.
+     * 
+     * @param int $type
+     * @param object $object
+     * @return $this
+     */
+    public function dispatch($type, $object)
+    {
+        foreach ($this->callbacks as $callback) {
+            $callback($type, $object, $this);
+        }
+        return $this;
+    }
+
+    /**
+     * Add a closure function.
+     * 
+     * @param function $callback
+     * @return $this
+     */
+    public function addEvent($callback)
+    {
+        if (is_callable($callback)) {
+            $this->callbacks[] = $callback;
+        }
+        return $this;
+    }
+
+    /**
+     * Get html value.
+     * 
+     * @return string
+     */
+    public function getHtml()
+    {
+        return $this->html;
+    }
+
+    /**
+     * Set html value.
+     * 
+     * @param string $html
+     * @return $this
+     */
+    public function setHtml($html)
+    {
+        $this->html = $html;
+        return $this;
+    }
+}
diff --git a/workflow/public_html/app.php b/workflow/public_html/app.php
index 9aa35b0ba..0ed5cffe2 100644
--- a/workflow/public_html/app.php
+++ b/workflow/public_html/app.php
@@ -4,6 +4,7 @@ use Illuminate\Foundation\Http\Kernel;
 use Maveriks\WebApplication;
 use Maveriks\Http\Response;
 use Maveriks\Pattern\Mvc\PhtmlView;
+use ProcessMaker\Core\AppEvent;
 use ProcessMaker\Exception\RBACException;
 
 // Because laravel has a __ helper function, it's important we include the class.g file to ensure our __ is used.
@@ -11,6 +12,7 @@ require_once __DIR__ . '/../../gulliver/system/class.g.php';
 require_once __DIR__ . '/../../bootstrap/autoload.php';
 require_once __DIR__ . '/../../bootstrap/app.php';
 
+AppEvent::getAppEvent();
 
 register_shutdown_function(
     create_function(