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[ComVisible(true), Guid("0015EC28-C85F-49a8-9B1A-DC91E6345274"),
    ClassInterface(ClassInterfaceType.AutoDispatch)]
    public class MyGadgetBodyBehavior : IElementBehavior, IHTMLPainter
    {
        public delegate void SizeChangedEventHandler(SizeChangedEventArgs e);
        public event SizeChangedEventHandler onSizeChangedEvent;
        private AppScreenSnapHelper snapHelper;

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 public void Draw(RECT rcBounds, RECT rcUpdates, int lDrawFlags, IntPtr hdc, IntPtr pvDrawObject)
        {
            Graphics g = Graphics.FromHdc(hdc);
            Bitmap buffer = new Bitmap(width, height);
            Graphics gBuffer = Graphics.FromImage(buffer);

            AppScreenSnapHelper.Image image = snapHelper.GetScreenSnap();
            gBuffer.DrawImage(image.Bitmap, 0, 0);
            image.Dispose();

            string imageSrc = ((IHTMLElement2)body).currentStyle.backgroundImage;
            if (!string.IsNullOrEmpty(imageSrc))
            {
                Match match = Regex.Match(imageSrc, @"url\(""file:///(?<path>.*)""\)");
                if (match.Success)
                {
                    imageSrc = match.Groups["path"].Value;
                    using (Bitmap bitmap = new Bitmap(imageSrc))
                    {
                        object obj = ((IHTMLElement2)body).currentStyle.marginLeft;
                        gBuffer.DrawImage(bitmap, new Rectangle(0, 0, width, height));
                    }
                }
            }
            g.DrawImage(buffer, rcUpdates.left, rcUpdates.top,
                      new Rectangle(rcUpdates.left - rcBounds.left,
                      rcUpdates.top - rcBounds.top, rcUpdates.right - rcUpdates.left,
                      rcUpdates.bottom - rcUpdates.top), GraphicsUnit.Pixel);
            buffer.Dispose();
            gBuffer.Dispose();
            g.Dispose();
            
        }

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internal Image GetScreenSnap(bool isForceRefresh)
        {
            if (CheckPositionAndSize() && !isForceRefresh)
            {
                return screenImage;
            }

            control.Visibility = Visibility.Hidden;
            RenderTargetBitmap bitmap = new RenderTargetBitmap((int)parentWindow.Width,
               (int)parentWindow.Width, 96, 96, PixelFormats.Pbgra32);
            bitmap.Render(parentWindow);
            BitmapSource bitmapSource = bitmap.CloneCurrentValue();
            Bitmap newBitmap = ConvertSourceImageToBitmap(bitmapSource);
            newBitmap = ClipBitmap(newBitmap, new System.Drawing.Rectangle((int)oldPoint.X, (int)oldPoint.Y,
                ((int)control.Width == 0 ? 1 : (int)control.Width), ((int)control.Height) == 0 ? 1 : (int)control.Height));

            control.Visibility = Visibility.Visible;
            screenImage = new Image(newBitmap, imagePtr);
            return screenImage;
        }