Reversing case in emacs

[Gerry.Feldman at compaq.com (Jerry Feldman)]

I have a case where I need to flip the case on an individual character. 
Short of writing an emacs command, it there a command (or more 
specifically an emacs lisp function) in emacs to either reverse case, up 
case, or down case a single character. In vi, there is a ~ which reverse 
cases a character.
--
Jerry Feldman
Contractor, eInfrastructure Partner Engineering   
508-467-4315 http://www.testdrive.compaq.com/linux/

Compaq Computer Corp.
200 Forest Street MRO1-3/F1
Marlboro, Ma. 01752
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