这里编写的菜单带有历史功能，每次进入新的文件之后，会将你操作的历史记录下来-The menu here, with a history of writing functions into a new file each time after the operation history will record your

实现弹出式菜单的创建，可实现文件的打开及存储操作。(Create a pop-up menu,The open and storage operation of the file can be realized.)