ARCed.UI.DockPanel.SplitterDragHandler.BeginDrag C# (CSharp) Method

            public void BeginDrag(ISplitterDragSource dragSource, Rectangle rectSplitter)
            {
                this.DragSource = dragSource;
                this.RectSplitter = rectSplitter;

                if (!BeginDrag())
                {
                    this.DragSource = null;
                    return;
                }

                this.Outline = new SplitterOutline();
                this.Outline.Show(rectSplitter);
                this.DragSource.BeginDrag(rectSplitter);
            }