How to calculate the difference of two time values

[djsmiler]

I Have a time in a text box which is the start time of the job.
I also have a time in a text box which is the end time of the job.
I am trying to work out the total time from the start time and end time
fileds and output the results into the text box called total time.
Please can someone help.

 

[Allen Browne]

See:
Calculating elapsed time
at:
http://allenbrowne.com/casu-13.html