time duration function

[Kenneth J. Kutz]

Does anybody have on their shelf a function which given two date/time
pairs returns the duration of time between the two (say in
hh:mm:ss format)? 

Thanks,

-- 
  Kenneth J. Kutz		  Internet 	kutz at andy.bgsu.edu         
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  Bowling Green State Univ.       US Mail   238 Math Science, BG OH 43403