ARCed.UI.DockPanel.DragHandlerBase.IMessageFilter C# (CSharp) Method

            bool IMessageFilter.PreFilterMessage(ref Message m)
            {
                if (m.Msg == (int)Msgs.WM_MOUSEMOVE)
                    this.OnDragging();
                else if (m.Msg == (int)Msgs.WM_LBUTTONUP)
                    this.EndDrag(false);
                else if (m.Msg == (int)Msgs.WM_CAPTURECHANGED)
                    this.EndDrag(true);
                else if (m.Msg == (int)Msgs.WM_KEYDOWN && (int)m.WParam == (int)Keys.Escape)
                    this.EndDrag(true);

                return this.OnPreFilterMessage(ref m);
            }