编写一个单文档应用程序，在窗口中建立一个和客户区大小相同的RichEdit编辑框，File里有新建保存打开退出，Edit里有撤销等，Style里有颜色和字体，还有默认，颜色里有红黄蓝绿黑，字体里有斜体加粗下划线。-Write a single document application, create a client area of ​ ​ the same size and RichEdit edit box in the window, File, there are new saving open exit, Edit, there revocation, Style, there are colors and fonts, as well as default colors, there are red, yellow, blue, green and black, underlined bold italic font there.