--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cms/drupal/modules/overlay/overlay.api.php	Fri Sep 08 12:04:06 2017 +0200
@@ -0,0 +1,40 @@
+<?php
+
+/**
+ * @file
+ * Hooks provided by Overlay module.
+ */
+
+/**
+ * @addtogroup hooks
+ * @{
+ */
+
+/**
+ * Allow modules to act when an overlay parent window is initialized.
+ *
+ * The parent window is initialized when a page is displayed in which the
+ * overlay might be required to be displayed, so modules can act here if they
+ * need to take action to accommodate the possibility of the overlay appearing
+ * within a Drupal page.
+ */
+function hook_overlay_parent_initialize() {
+  // Add our custom JavaScript.
+  drupal_add_js(drupal_get_path('module', 'hook') . '/hook-overlay.js');
+}
+
+/**
+ * Allow modules to act when an overlay child window is initialized.
+ *
+ * The child window is initialized when a page is displayed from within the
+ * overlay, so modules can act here if they need to take action to work from
+ * within the confines of the overlay.
+ */
+function hook_overlay_child_initialize() {
+  // Add our custom JavaScript.
+  drupal_add_js(drupal_get_path('module', 'hook') . '/hook-overlay-child.js');
+}
+
+/**
+ * @} End of "addtogroup hooks".
+ */