OK this program isn't entirely done, but it is functional so I thought I would release it so people can tell me what they think.
Anyway, put all the information you want in Options, and then type your message in the box. Click encode, and then go to send a message to the person. Press Shift+Ins or Ctrl+V. Also make sure the other person has the same key as you and is using the same encryption method, or they won't be able to decode your messages. When you recieve a message, highlight it and copy it (Ctrl+C or Ctrl+Ins). Then just click decode.