使用WPF来创建 Metro UI

// Is this a double-click?  if (DateTime.Now.Subtract(m_headerLastClicked) <= s_doubleClick)  {    // Execute the code inside the event handler for the    // restore button click passing null for the sender    // and null for the event args.    HandleRestoreClick(null, null);  }    m_headerLastClicked = DateTime.Now;    if (Mouse.LeftButton == MouseButtonState.Pressed)  {    DragMove();  }

Rectangle clickedRectangle = (Rectangle)sender;       switch (clickedRectangle.Name)  {    case "top":        Cursor = Cursors.SizeNS;        ResizeWindow(ResizeDirection.Top);        break;    case "bottom":        Cursor = Cursors.SizeNS;        ResizeWindow(ResizeDirection.Bottom);        break;    // ...  }

/// 
 /// Resizes the window.  /// 
 /// The direction.  private void ResizeWindow(ResizeDirection direction)  {    NativeMethods.SendMessage(m_hwndSource.Handle, WM_SYSCOMMAND,        (IntPtr)(61440 + direction), IntPtr.Zero);  }    [DllImport("user32.dll", CharSet = CharSet.Auto)]  internal static extern IntPtr SendMessage(    IntPtr hWnd,    UInt32 msg,    IntPtr wParam,    IntPtr lParam);

/// 
 /// Raises the  event.  /// This method is invoked whenever  ///  /// is set to true internally.  /// 
 /// The  /// that contains the event data.  protected override void OnInitialized(EventArgs e)  {    AllowsTransparency    = false;    ResizeMode            = ResizeMode.NoResize;    Height                = 480;    Width                 = 852;     WindowStartupLocation = WindowStartupLocation.CenterScreen;    WindowStyle           = WindowStyle.None;      SourceInitialized    += HandleSourceInitialized;      base.OnInitialized(e);  }       /// 
 /// Handles the source initialized.  /// 
 /// The sender.  /// The  /// instance containing the event data.  private void HandleSourceInitialized(Object sender, EventArgs e)  {    m_hwndSource = (HwndSource)PresentationSource.FromVisual(this);      // Returns the HwndSource object for the window    // which presents WPF content in a Win32 window.    HwndSource.FromHwnd(m_hwndSource.Handle).AddHook(        new HwndSourceHook(NativeMethods.WindowProc));      // http://msdn.microsoft.com/en-us/library/aa969524(VS.85).aspx    Int32 DWMWA_NCRENDERING_POLICY = 2;    NativeMethods.DwmSetWindowAttribute(        m_hwndSource.Handle,        DWMWA_NCRENDERING_POLICY,        ref DWMWA_NCRENDERING_POLICY,        4);      // http://msdn.microsoft.com/en-us/library/aa969512(VS.85).aspx    NativeMethods.ShowShadowUnderWindow(m_hwndSource.Handle);  }

/// 
 /// Initializes the surrounding windows.  /// 
 private void InitializeSurrounds()  {    // Top.    m_wndT = CreateTransparentWindow();      // Left.    m_wndL = CreateTransparentWindow();      // Bottom.    m_wndB = CreateTransparentWindow();      // Right.    m_wndR = CreateTransparentWindow();      SetSurroundShadows();  }       /// 
 /// Creates an empty window.  /// 
 ///  private static Window CreateTransparentWindow()  {    Window wnd             = new Window();    wnd.AllowsTransparency = true;    wnd.ShowInTaskbar      = false;    wnd.WindowStyle        = WindowStyle.None;    wnd.Background         = null;      return wnd;  }    /// 
 /// Sets the artificial drop shadow.  /// 
 /// if set to true [active].  private void SetSurroundShadows(Boolean active = true)  {    if (active)    {        Double cornerRadius = 1.75;          m_wndT.Content = GetDecorator(            "Images/ACTIVESHADOWTOP.PNG");        m_wndL.Content = GetDecorator(            "Images/ACTIVESHADOWLEFT.PNG", cornerRadius);        m_wndB.Content = GetDecorator(            "Images/ACTIVESHADOWBOTTOM.PNG");        m_wndR.Content = GetDecorator(            "Images/ACTIVESHADOWRIGHT.PNG", cornerRadius);    }    else    {        m_wndT.Content = GetDecorator(            "Images/INACTIVESHADOWTOP.PNG");        m_wndL.Content = GetDecorator(            "Images/INACTIVESHADOWLEFT.PNG");        m_wndB.Content = GetDecorator(            "Images/INACTIVESHADOWBOTTOM.PNG");        m_wndR.Content = GetDecorator(            "Images/INACTIVESHADOWRIGHT.PNG");    }  }    [DebuggerStepThrough]  private Decorator GetDecorator(String imageUri, Double radius = 0)  {    Border border       = new Border();    border.CornerRadius = new CornerRadius(radius);    border.Background   = new ImageBrush(        new BitmapImage(            new Uri(BaseUriHelper.GetBaseUri(this),                imageUri)));      return border;  }