Introduction - If you have any usage issues, please Google them yourself
This program was modeled on Notepad function is purely for learning. (1) basically implements a new, open, save, exit, and help functions. (2) There are to achieve undo and redo, as well as cut, copy, paste function shortcut keys operation. (3) by Option option can be set foreground and background color. There are some features in the continuous learning process will go through to achieve.