1、　　可显示当前鼠标的行列位置

2、　　实现字符串的查找与替换

3、　　实现记事本中的常用菜单项

4、　　*实现文件的打开与保存

5、　　*设置文本的字体

-One can show that the ranks of the current mouse position 2, implementation of the search string with the replacement of 3, implementation of the commonly used Notepad menu item 4,* implementation of the open and save documents 5,* set the text font