System.Windows.UIElement.CaptureMouse C# (CSharp) Method

        public bool CaptureMouse()
        {
            return NativeMethods.uielement_capture_mouse (native);
        }

        public static void Start(UIElement element)
        {
            if (Element != null)
                throw new Exception("Another element is being dragged.  Only one element at a time may be dragged.");

            Element = element;
            Element.CaptureMouse();
            Element.MouseMove += new MouseEventHandler(UIElement_MouseMove);

            TransformGroup tg = Element.RenderTransform as TransformGroup;
            if (tg == null)
            {
                tg = CreateTransformGroup();
                Element.RenderTransform = tg;

            }//end if

            TranslateTransform tt = tg.Children.Where(t => t is TranslateTransform).SingleOrDefault() as TranslateTransform;
            if (tt == null)
                tt = new TranslateTransform();

            tt.X = 0;
            tt.Y = 0;

            OnDragStarted(Element);
        }