diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/core/core_plugin.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/core/core_plugin.cpp
index a681d8975..a1c3dced0 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/core/core_plugin.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/core/core_plugin.cpp
@@ -70,7 +70,7 @@ void CorePlugin::extensionsInitialized()
 	}
 	else
 	{
-		_mainWindow = new CMainWindow(_plugMan);
+		_mainWindow = new CMainWindow(this);
 #ifdef Q_WS_X11
 		_mainWindow->setAttribute(Qt::WA_TranslucentBackground);
 		_mainWindow->setAttribute(Qt::WA_NoSystemBackground, false);
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/core/icore_listener.h b/code/nel/tools/3d/object_viewer_qt/src/plugins/core/icore_listener.h
new file mode 100644
index 000000000..c37ba3366
--- /dev/null
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/core/icore_listener.h
@@ -0,0 +1,56 @@
+// Object Viewer Qt - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
+// Copyright (C) 2010  Winch Gate Property Limited
+// Copyright (C) 2011  Dzmitry Kamiahin <dnk-88@tut.by>
+// Parts by Nokia Corporation (qt-info@nokia.com) Copyright (C) 2009.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef ICORE_LISTENER_H
+#define ICORE_LISTENER_H
+
+#include <QtCore/QObject>
+
+class QWidget;
+
+namespace Core
+{
+/**
+@interface ICoreListener
+@brief The ICoreListener is an interface for providing a hook for plugins to veto on close event emitted from
+the core plugin.
+@details You implement this interface if you want to prevent the closing of the whole application.
+If the application window requests a close, then first ICoreListener::closeMainWindow() is called
+(in arbitrary order) on all registered objects implementing this interface.
+If one if these calls returns false, the process is aborted and the event is ignored.  If all calls return
+true, the corresponding signal is emitted and the event is accepted/performed.
+
+You need to add your implementing object to the plugin managers objects:
+PluginManager->addObject(yourImplementingObject);
+Don't forget to remove the object again at deconstruction (e.g. in the destructor of
+your plugin)
+*/
+class ICoreListener
+{
+public:
+	virtual ~ICoreListener() {}
+
+	/// Return false from the implemented method if you want to prevent the event.
+	virtual bool closeMainWindow() const = 0;
+};
+
+} // namespace Core
+
+Q_DECLARE_INTERFACE(Core::ICoreListener, "dev.ryzom.com.ICoreListener/0.1")
+
+#endif // ICORE_LISTENER_H
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/core/main_window.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/core/main_window.cpp
index b077b25c2..ce94a738e 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/core/main_window.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/core/main_window.cpp
@@ -17,7 +17,9 @@
 
 // Project includes
 #include "main_window.h"
+#include "core_plugin.h"
 #include "iapp_page.h"
+#include "icore_listener.h"
 #include "core_constants.h"
 #include "settings_dialog.h"
 
@@ -29,11 +31,12 @@
 namespace Core
 {
 
-CMainWindow::CMainWindow(ExtensionSystem::IPluginManager *pluginManager, QWidget *parent)
+CMainWindow::CMainWindow(CorePlugin *corePlugin, QWidget *parent)
 	: QMainWindow(parent),
 	  _lastDir(".")
 {
-	_pluginManager = pluginManager;
+	_corePlugin = corePlugin;
+	_pluginManager = _corePlugin->pluginManager();
 
 	setObjectName(Constants::MAIN_WINDOW);
 
@@ -41,14 +44,7 @@ CMainWindow::CMainWindow(ExtensionSystem::IPluginManager *pluginManager, QWidget
 	_tabWidget->setTabPosition(QTabWidget::South);
 	setCentralWidget(_tabWidget);
 
-	QList<QObject *> listObjects = _pluginManager->allObjects();
-	QList<IAppPage *> listAppPages;
-	Q_FOREACH(QObject *obj, listObjects)
-	{
-		IAppPage *appPage = dynamic_cast<IAppPage *>(obj);
-		if (appPage)
-			listAppPages.append(appPage);
-	}
+	QList<IAppPage *> listAppPages = _corePlugin->getObjects<IAppPage>();
 
 	Q_FOREACH(IAppPage *appPage, listAppPages)
 	{
@@ -98,6 +94,15 @@ void CMainWindow::about()
 
 void CMainWindow::closeEvent(QCloseEvent *event)
 {
+	QList<ICoreListener *> listeners = _corePlugin->getObjects<ICoreListener>();
+	Q_FOREACH(ICoreListener *listener, listeners)
+	{
+		if (!listener->closeMainWindow())
+		{
+			event->ignore();
+			return;
+		}
+	}
 	QMainWindow::closeEvent(event);
 }
 
@@ -160,12 +165,6 @@ void CMainWindow::createMenus()
 	_helpMenu->addAction(_aboutAction);
 	_helpMenu->addAction(_aboutQtAction);
 	_helpMenu->addAction(_pluginViewAction);
-
-	_pluginManager->addObject(_fileMenu);
-	_pluginManager->addObject(_editMenu);
-	_pluginManager->addObject(_viewMenu);
-	_pluginManager->addObject(_toolsMenu);
-	_pluginManager->addObject(_helpMenu);
 }
 
 void CMainWindow::createStatusBar()
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/core/main_window.h b/code/nel/tools/3d/object_viewer_qt/src/plugins/core/main_window.h
index 3f2555d82..e394e85d7 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/core/main_window.h
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/core/main_window.h
@@ -31,13 +31,14 @@
 namespace Core
 {
 class CSettingsDialog;
+class CorePlugin;
 
 class CMainWindow : public QMainWindow
 {
 	Q_OBJECT
 
 public:
-	CMainWindow(ExtensionSystem::IPluginManager *pluginManager, QWidget *parent = 0);
+	CMainWindow(CorePlugin *corePlugin, QWidget *parent = 0);
 	~CMainWindow();
 
 	inline QSettings *settings() const
@@ -61,6 +62,7 @@ private:
 
 	ExtensionSystem::IPluginManager *_pluginManager;
 	ExtensionSystem::CPluginView *_pluginView;
+	CorePlugin *_corePlugin;
 
 	QPalette _originalPalette;
 	QString _lastDir;
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/CMakeLists.txt b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/CMakeLists.txt
index 9afe59a2b..d14b42806 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/CMakeLists.txt
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/CMakeLists.txt
@@ -14,6 +14,7 @@ SET(OVQT_PLUG_EXAMPLE_HDR 	plugin1.h
 							simple_viewer.h
 							example_settings_page.h
 							${CMAKE_CURRENT_SOURCE_DIR}/../core/iapp_page.h
+							${CMAKE_CURRENT_SOURCE_DIR}/../core/icore_listener.h
 							${CMAKE_CURRENT_SOURCE_DIR}/../core/ioptions_page.h)
 
 SET(OVQT_PLUG_EXAMPLE_UIS	example_settings_page.ui)
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/plugin1.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/plugin1.cpp
index a8974478e..07185c5fa 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/plugin1.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/plugin1.cpp
@@ -26,6 +26,7 @@ bool MyPlugin::initialize(ExtensionSystem::IPluginManager *pluginManager, QStrin
 
 	_plugMan->addObject(new CExampleSettingsPage(this));
 	_plugMan->addObject(new CExampleAppPage(this));
+	_plugMan->addObject(new CCoreListener(this));
 	return true;
 }
 
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/simple_viewer.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/simple_viewer.cpp
index bbf9df80e..e128710c4 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/simple_viewer.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/simple_viewer.cpp
@@ -20,6 +20,7 @@
 // Qt includes
 #include <QtGui/QWidget>
 #include <QtGui/QGridLayout>
+#include <QtGui/QMessageBox>
 
 // NeL includes
 
@@ -38,5 +39,16 @@ CSimpleViewer::CSimpleViewer(QWidget *parent)
 	gridLayout->addWidget(_nelWidget, 0, 0, 1, 1);
 }
 
+bool CCoreListener::closeMainWindow() const
+{
+	int ret = QMessageBox::question(0, tr("Example close event hook"),
+									tr("Do you want to close window?"),
+									QMessageBox::Yes | QMessageBox::No);
+
+	if (ret == QMessageBox::Yes)
+		return true;
+	else
+		return false;
+}
 
 } /* namespace Plugin */
\ No newline at end of file
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/simple_viewer.h b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/simple_viewer.h
index e9d83cfa3..cb3c1cf87 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/simple_viewer.h
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/simple_viewer.h
@@ -21,6 +21,7 @@
 
 // Project includes
 #include "qnel_widget.h"
+#include "../core/icore_listener.h"
 
 // Qt includes
 #include <QtCore/QObject>
@@ -38,6 +39,17 @@ public:
 	virtual ~CSimpleViewer() {}
 };
 
+class CCoreListener : public QObject, public Core::ICoreListener
+{
+	Q_OBJECT
+	Q_INTERFACES(Core::ICoreListener)
+public:
+	CCoreListener(QObject *parent = 0): QObject(parent) {}
+	virtual ~CCoreListener() {}
+
+	virtual bool closeMainWindow() const;
+};
+
 } // namespace Plugin
 
 #endif // SIMPLE_VIEWER_H