获取屏幕颜色的程序例子，双击任务栏上的程序可以关闭，单击屏幕任意地方，可以获取当前颜色值，点右键复制到剪贴板-Procedures to obtain examples of the color screen, double-click the task bar on the program can be closed, click anywhere on the screen, you can get the current color value, right click copy to c