Ugh!! Sometimes I really, REALLY hate you "TXT" key! (Is there an app...)

[MidwestDrummer]

How dare you take me to the inbox!! I mean, I've just finished composing a text message that has come within 2 or 3 characters of the 160 character limit, and all I want to do is put a smiley face on the end with a colon and a parentheses. But just as Function (FN) key and I are looking to engage, you decide to butt in and insert yourself in Function key's place! Why must you wipe out that text message I just finished composing, only to take me back to the inbox? Why?!


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Is there ANY app that completely disables the TXT key while in the process of composing a new text message? If so, I would be eternally grateful!!