I am 13 years old, i started learning vb in school library and also bout some books.

I decided to make a html editor. i made one that has basic functions, eg save,save as,open,preview in browser,print code,undo,redo. What else can i add. i was thinking of having a button that has html tags on. when u click on one it prints it. ii got stuck on making it. can you please help me?