1 - Find all the remaining bugs!
3 - ES_LEFT, ES_RIGHT and ES_CENTER. ES_RIGHT and ES_CENTER cannot be
4 used with single line edit controls or be combined with ES_AUTOHSCROLL.
6 - Hide selection when window loses focus and ES_NOHIDESEL to disable
9 - ES_LOWERCASE and ES_UPPERCASE.
11 - ES_PASSWORD and EM_PASSWORDCHAR.
13 - ES_OEMCONVERT. Probably won't do anything very much.
17 - ES_WANTRETURN and Ctrl-Enter to move to next line when this
18 functionality is enabled.
20 - Implement undo buffer correctly. Windows allows the user to undo
21 entered text as well as deleted text. You can also undo an undo.
23 - Add word wrap - this is a very big change!