Glass effects in WPF

Glass effects in WPF

• Develop3r

  I don't think I'm setting UIElements background to transparent. Only window background

  here is the code:

  public static bool ExtendGlassFrame(Window window, Thickness margin)
  {
  if(!DwmIsCompositionEnabled())
  return false;

  IntPtr hwnd = new WindowInteropHelper(window).Handle;
  if (hwnd == IntPtr.Zero)
  throw new InvalidOperationException("The Window must be shown efore extending gflass.");

  window.Background = Brushes.Transparent;
  HwndSource.FromHwnd(hwnd).CompositionTarget.BackgroundColor = Colors.Transparent;
  
  MARGINS margins = new MARGINS(margin);
  DwmExtendFrameIntoClientArea(hwnd, ref margins);
  return true;
  }
  
  struct MARGINS
  {
  public int Left;
  public int Right;
  public int Top;
  public int Bottom;
  
  public MARGINS(Thickness t)
  {
  Left = (int) t.Left;
  Right = (int) t.Right;
  Top = (int) t.Top;
  Bottom = (int) t.Bottom;
  }
  }

  [DllImport("dwmapi.dll", PreserveSig = false)]
  static extern void DwmExtendFrameIntoClientArea(IntPtr hwnd, ref MARGINS margins);

  [DllImport("dwmapi.dll", PreserveSig = false)]
  static extern bool DwmIsCompositionEnabled();
  

  
  

• Tolga Erdogus

  Will this only work for Vista
  

• Andreas_

  I downloaded, compiled and ran your sample on my machine and I don't see the issue pictured in the included image. I'm running a post-Beta 2 build, so that doesn't necessarily help you right away, but it means there are two pieces of good news:

  1. Your code is right; and
  2. Whatever problem you are seeing now has been fixed, so you can look forward to it working well in a future build.

  
  
  

• SturnaR

  The Desktop Window Manager (DWM) is a Vista feature.
  
  

• Nibu Thomas

  couldnt access the zip. So i am just guessing here.

  Looks like you are setting the window bvackground to transparent and the UIElements background to transparent which might explain the results you are getting.

  HTH

  
  
• Glass effects in WPF