创建一个程序读入并显示一幅图像，运行用户在图像中选择一个矩形区域，然后通过按住鼠标按键画一个矩形，当鼠标键放开，高亮显示矩形框。-Create a program that reads and displays an image, run user select a rectangular area in the image, and then hold down the mouse button, draw a rectangle, release the mouse button, the