diff --git a/demo/demo.py b/demo/demo.py
index 5ba8d42..1254eef 100644
--- a/demo/demo.py
+++ b/demo/demo.py
@@ -359,6 +359,7 @@ class MainWindow(MainWindowUI, MainWindowBase):
         floating = sender.property("Floating")
         dock_widget = self.create_editor_widget()
         dock_widget.setFeature(QtAds.CDockWidget.DockWidgetDeleteOnClose, True)
+        dock_widget.setFeature(QtAds.CDockWidget.DockWidgetForceCloseWithArea, True)
         dock_widget.closeRequested.connect(self.on_editor_close_requested)
         
         if floating:
diff --git a/examples/centralwidget/centralWidget.py b/examples/centralwidget/centralWidget.py
index e3f31c6..581b00d 100644
--- a/examples/centralwidget/centralWidget.py
+++ b/examples/centralwidget/centralWidget.py
@@ -106,6 +106,11 @@ class MainWindow(MainWindowUI, MainWindowBase):
         self.perspective_combobox.clear()
         self.perspective_combobox.addItems(self.dock_manager.perspectiveNames())
         self.perspective_combobox.setCurrentText(perspective_name)
+        
+    def closeEvent(self, event: QCloseEvent):
+        self.dock_manager.deleteLater()
+        super().closeEvent(event)
+
 
 if __name__ == '__main__':
     app = QApplication(sys.argv)
diff --git a/sip/DockManager.sip b/sip/DockManager.sip
index b76ee25..941fca7 100644
--- a/sip/DockManager.sip
+++ b/sip/DockManager.sip
@@ -135,7 +135,6 @@ protected:
 	ads::CDockOverlay* dockAreaOverlay() const;
     void notifyWidgetOrAreaRelocation(QWidget* RelocatedWidget);
     void notifyFloatingWidgetDrop(ads::CFloatingDockContainer* FloatingWidget);
-    ads::CDockWidget* focusedDockWidget() const;
 
     virtual void showEvent(QShowEvent *event);
 
@@ -217,6 +216,9 @@ public:
 	void setViewMenuInsertionOrder(ads::CDockManager::eViewMenuInsertionOrder Order);
 	bool isRestoringState() const;
 	static int startDragDistance();
+    ads::CDockWidget* focusedDockWidget() const;
+    QList<int> splitterSizes(ads::CDockAreaWidget *ContainedArea) const;
+    void setSplitterSizes(ads::CDockAreaWidget *ContainedArea, const QList<int>& sizes);
 
 public slots:
 	void openPerspective(const QString& PerspectiveName);
diff --git a/sip/DockWidgetTab.sip b/sip/DockWidgetTab.sip
index 32d819b..0bc610a 100644
--- a/sip/DockWidgetTab.sip
+++ b/sip/DockWidgetTab.sip
@@ -35,6 +35,8 @@ public:
 	virtual bool event(QEvent *e);
 	void setElideMode(Qt::TextElideMode mode);
     void updateStyle();
+    QSize iconSize() const;
+    void setIconSize(const QSize& Size);
 
 public slots:
 	virtual void setVisible(bool visible);