this.SourceInitialized += new EventHandler(win_SourceInitialized); //这里写在构造函数里

 

 

     void win_SourceInitialized(object sender, EventArgs e)

        {

            HwndSource hwndSource = PresentationSource.FromVisual(this) as HwndSource;

            if (hwndSource != null)

            {

                hwndSource.AddHook(new HwndSourceHook(WindowProc));

            }

        }

 

 protected virtual IntPtr WindowProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)

        {

            switch (msg)

            {

                case 0x0201:

                    //MessageBox.Show("鼠标按下!");

                    Count = 0;

                    break;

            }

            return IntPtr.Zero;

        }