Hi!
I'm back again, but this time I'm going to write all my questions at once:
1) I have a few pixels between the Rich Text Box and the borders of the form, but when I run the program and I resize the form my Rich Text Box doesn't get resized. How do I fix that?
2) How do I Save files with my own extension?
3) How do I Open files with my own extension?

And by the way: Thanks to all of you who helped me. Hopefully, soon I will be answering questions =)

/ Erik