Pair Programming find your encode/decode functions from before. wrap them in a GUI. Should have an Entry box with Label "Msg:". Should have an Entry box with Label "Secret Msg:". At the bottom of the screen are two buttons, each with "encode" or "decode" on it. Pressing encode snags the text from the plain entry box, encodes it, and pastes the resultant encoded msg into the encoded/secret msg box. Pressing decode snags the text from the encoded/secret entry box, decodes it, and pastes the resultant plain txt msg into the decoded/plain msg box.