Binary to Text converter, and vis versa

I have NO idea how to go about doing this, or how to enable copy and paste in those black windows. Does anyone know a tut or something where I might find this information. I really want an app. that can do that so please help me. Or try. Thanks in advance.

What have you tried so far?

And are you talking about a user entering text that will be converted to binary (and vice versa) or do you want to convert a text file to binary?

You need to make an attempt - we won't do your homework for you.