实现了一个半透明的窗口，这个窗口是你无法用鼠标点击到的，就像这个窗口不存在一样，对界面编程和鼠标绘图编程很有参考价值。-To achieve a translucent window that you can not use the mouse to click on to, just as the window does not exist, like the mouse on the interface programming and graphics programming is refe