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lexical for calculating delta-time?

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The Question is:

 
I'm trying to find an easy way to calculate the difference
between two times in DCL so I can calculate the running time
of a specific process in a batch file.  I capture the
time using F$TIME() before the process runs and then
again after it finishes.  I simply want to know if there is
a function that will calculate the difference in these
two times without having to devise a manual way of
calculating it.
Thank You very much!

The Answer is :

 
  There is no direct lexical function to provide this calculation.
 
  This topic has been discussed extensively in the comp.os.vms newsgroup
  in recent times -- please visit the INFO-VAX archives, the archives at
  http://www.dejanews.com/, or any of the other available archives, for
  old postings from the comp.os.vms newsgroup on this topic.

  
     
     answer written or last revised on ( 22-JUN-1998 )
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