Excel: Counting the number of hours between two date/time fields

As the title says, I'm basically looking to calculate the difference in hours between two date/time fields in this format DD/MM/YY HH:MM. I have tried using a custom add in I found but it doesn't seem to work. Is there a potential VBA/macro solution? Any help would be greatly appreciated. Thanks in advance!

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This thread is current as of August 24, 2014.

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