I've worked on this for a total of eight hours now inbetween everything else, but this is a sneak peak of a new product/freebie I am working on. Take special note of the syntax editor... I couldn't make richedit do what I wanted, so have been writing a syntax highlighting, intellisense supporting editor from scratch.
Eventually it will colour keywords and provide region support, but just showing text, the line numbers, a movable cursor and scroll bars was a milestone for me given it is done totally from scratch (even if the scrollbars are yet to be mouse enabled).