WPF

public static BitmapImage BitmapImageFromBytes(byte[] bytes) 
{ 
  BitmapImage image = null; 
  MemoryStream stream = null; 
  try { 
    stream = new MemoryStream(bytes); 
    stream.Seek(0, SeekOrigin.Begin);
    System.Drawing.Image img = System.Drawing.Image.FromStream(stream);
    image = new BitmapImage(); 
    image.BeginInit();
    MemoryStream ms = new MemoryStream();
    img.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
    ms.Seek(0, SeekOrigin.Begin);
    image.StreamSource = ms;
    //image.StreamSource = stream; 
    //image.DecodePixelWidth = desiredX; 
    //image.DecodePixelHeight = desiredY; 
    image.StreamSource.Seek(0, SeekOrigin.Begin);
    image.EndInit(); 
  } 
  catch (Exception ex) 
  { 
    if (ex != null) 
    { 
    } 
    throw; 
  } 
  finally { 
    stream.Close(); 
    stream.Dispose(); 
  } 
  return image; 
}

John Simmons / outlaw programmer wrote:

image.DecodePixelWidth = desiredX;
image.DecodePixelHeight = desiredY;
image.EndInit();

Taskbar.TabbedThumbnail.TabbedThumbnailActivated += new EventHandler<TabbedThumbnailEventArgs>(TabbedThumbnail_TabbedThumbnailActivated);

Taskbar.TabbedThumbnail.TabbedThumbnailClosed += new EventHandler<TabbedThumbnailEventArgs>(TabbedThumbnail_TabbedThumbnailClosed);

void TabbedThumbnail_TabbedThumbnailClosed(object sender, TabbedThumbnailEventArgs e)
{
    // do the thing for closing the UserControl
}

void TabbedThumbnail_TabbedThumbnailActivated(object sender, TabbedThumbnailEventArgs e)
{
    // do the thing for activate window
}

TabbedThumbnailPreview thumnailPreview = new TabbedThumbnailPreview(this, myUserControl);
            thumnailPreview.Title = "My UserControl Title";
            thumnailPreview.InvalidatePreview();

            Taskbar.TabbedThumbnail.AddThumbnailPreview(thumnailPreview);