How to apply a bitmap created using a Windows Forms control to a BitmapSource?

Question

I want to create an image of a control that is an imported ActiveX control and display that image in WPF. The reason I don't use the windows host is because it is too slow (I want to create a list with these activex controls): so far I have:

    public Bitmap CaptureCtrl(Control ctrl)
    {
        // Ein neues Image mit der grösse des jeweiligen Controls anlegen
        Console.WriteLine("new Bitmap({0:d}, {0:d}, g)", ctrl.Size.Width, ctrl.Size.Height);
        Bitmap newImage = new Bitmap(ctrl.Size.Width, ctrl.Size.Height);

        Graphics memoryGraphics = Graphics.FromImage(newImage);
        //Handle holen
        var hwnd = ctrl.Handle;
        IntPtr src = NativeMethods.GetDC(hwnd);
        IntPtr dest = memoryGraphics.GetHdc();

        // das Handle des Ziels
        // die X Position an der das Bild eingefügt werden soll
        // die Y Position an der das Bild eingefügt werden soll
        // die breite des Bildes
        // die höhe des Bildes
        // das Handle der Quelle
        // die X Position an der das Control liegt
        // die Y Position an der das Control liegt
        // Raster Operation Code an dieser Stelle ist es SRCCOPY
        // Natürlich muß der auf der Seite angegebene Hex wert noch in ein int umgerechnet werden
        // mehr informationen auf http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wceui40/html/_celrfternaryrasteroperations.asp
        Console.WriteLine("BitBlt(dest, 0, 0, {0:d}, {1:d}, src, {2:d}, {3:d}, 13369376)", ctrl.ClientRectangle.Width, ctrl.ClientRectangle.Height, ctrl.Location.X, ctrl.Location.Y);
        NativeMethods.BitBlt(dest, 0, 0, ctrl.ClientRectangle.Width, ctrl.ClientRectangle.Height, src, ctrl.Location.X, ctrl.Location.Y, 13369376);

        // Handles wieder Freigeben
        NativeMethods.ReleaseDC(hwnd, src);
        memoryGraphics.ReleaseHdc(dest);

        return newImage;
    }

and

    /// <summary>
    /// Converts a <see cref="System.Drawing.Bitmap"/> into a WPF <see cref="BitmapSource"/>.
    /// </summary>
    /// <remarks>Uses GDI to do the conversion. Hence the call to the marshalled DeleteObject.
    /// </remarks>
    /// <param name="source">The source bitmap.</param>
    /// <returns>A BitmapSource</returns>
    public static System.Windows.Media.Imaging.BitmapSource ToBitmapSource(this System.Drawing.Bitmap source)
    {
        System.Windows.Media.Imaging.BitmapSource bitSrc = null;

        IntPtr hBitmap = source.GetHbitmap();

        try
        {
            bitSrc = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
                hBitmap,
                IntPtr.Zero,
                Int32Rect.Empty,
                System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
        }
        catch (Win32Exception we)
        {
            bitSrc = null;
            Console.WriteLine(we.ToString()+ " data: "+we.Data + " code: " + we.ErrorCode);
        }
        finally
        {
            NativeMethods.DeleteObject(hBitmap);
        }

        return bitSrc;
    }

and calling code:

    using (var capture = host.CaptureCtrl(this.control))
    {
         this.image.Source = capture.ToBitmapSource();
    }

NativeMethod calls are imported from the DLL and should be clear. Now the problem is that the pictures are just gray and not filled with content (it seems that something is really copied)

Answer 1

( , ), , ...

caputure , :

public Bitmap CaptureCtrl(Control ctrl)
{
   // Ein neues Image mit der grösse des jeweiligen Controls anlegen
   Bitmap newImage = new Bitmap(ctrl.Size.Width, ctrl.Size.Height);
   ctrl.DrawToBitmap(newImage, ctrl.ClientRectangle);
   return newImage;
}