Tool tab vs. title bar

/// <summary>
/// Occurs when the <c>DockSite.WindowContextMenu</c> event occurs.
/// </summary>
/// <param name="sender">The sender of the event.</param>
/// <param name="e">A <see cref="DockingWindowContextMenuEventArgs"/> that contains the event data.</param>
private void OnDockSiteWindowContextMenu(object sender, DockingWindowContextMenuEventArgs e) {
    if (e.Window != null && !e.Window.IsMouseOver) {
        ToolWindowContainer container = e.OriginalSource as ToolWindowContainer;
        if (container != null) {
            foreach (object obj in e.ContextMenu.Items) {
                MenuItem item = obj as MenuItem;
                if (item != null && (item.Command == DockingCommands.MakeFloating || item.Command == DockingCommands.MakeDocked))
                    item.CommandTarget = container;
            }
        }
    }
}

public static class MyToolWindowCommandHandler {

    private static bool isRegistered = false;

    /////////////////////////////////////////////////////////////////////////////////////////////////////
    // PUBLIC PROCEDURES
    /////////////////////////////////////////////////////////////////////////////////////////////////////

    /// <summary>
    /// Registers custom command handlers for the <c>ToolWindowContainer</c> class.
    /// </summary>
    public static void Register() {
        if (isRegistered)
            return;

        // Register class command bindings
        isRegistered = true;
        CommandManager.RegisterClassCommandBinding(typeof(ToolWindowContainer), new CommandBinding(DockingCommands.MakeFloating, new ExecutedRoutedEventHandler(OnMakeFloatingCommandExecuted), new CanExecuteRoutedEventHandler(OnMakeFloatingCommandCanExecute)));
        CommandManager.RegisterClassCommandBinding(typeof(ToolWindowContainer), new CommandBinding(DockingCommands.MakeDocked, new ExecutedRoutedEventHandler(OnMakeDockedCommandExecuted), new CanExecuteRoutedEventHandler(OnMakeDockedCommandCanExecute)));
    }

    /////////////////////////////////////////////////////////////////////////////////////////////////////
    // COMMAND HANDLERS
    /////////////////////////////////////////////////////////////////////////////////////////////////////

    /// <summary>
    /// Occurs when the <see cref="RoutedCommand"/> needs to determine whether it can execute.
    /// </summary>
    /// <param name="sender">The sender of the event.</param>
    /// <param name="e">A <see cref="CanExecuteRoutedEventArgs"/> that contains the event data.</param>
    private static void OnMakeDockedCommandCanExecute(object sender, CanExecuteRoutedEventArgs e) {
        ToolWindowContainer container = (ToolWindowContainer)sender;
        e.CanExecute = container.CanDock;
    }

    /// <summary>
    /// Occurs when the <see cref="RoutedCommand"/> is executed.
    /// </summary>
    /// <param name="sender">The sender of the event.</param>
    /// <param name="e">An <see cref="ExecutedRoutedEventArgs"/> that contains the event data.</param>
    private static void OnMakeDockedCommandExecuted(object sender, ExecutedRoutedEventArgs e) {
        ToolWindowContainer container = (ToolWindowContainer)sender;
        container.Dock();
    }

    /// <summary>
    /// Occurs when the <see cref="RoutedCommand"/> needs to determine whether it can execute.
    /// </summary>
    /// <param name="sender">The sender of the event.</param>
    /// <param name="e">A <see cref="CanExecuteRoutedEventArgs"/> that contains the event data.</param>
    private static void OnMakeFloatingCommandCanExecute(object sender, CanExecuteRoutedEventArgs e) {
        ToolWindowContainer container = (ToolWindowContainer)sender;
        e.CanExecute = container.CanRaft;
    }

    /// <summary>
    /// Occurs when the <see cref="RoutedCommand"/> is executed.
    /// </summary>
    /// <param name="sender">The sender of the event.</param>
    /// <param name="e">An <see cref="ExecutedRoutedEventArgs"/> that contains the event data.</param>
    private static void OnMakeFloatingCommandExecuted(object sender, ExecutedRoutedEventArgs e) {
        ToolWindowContainer container = (ToolWindowContainer)sender;
        container.Float();
    }
}