InfoPath Dev

I have an InfoPath form that already has a person’s check in, start time, and, end time but I do not know how to calculate the two time points that I want to track.

1.      Time between Check in and Start Time

2.      Time between Start Time and End Time

 

I also want these fields not to be visible to the users of the form.

Can someone shed some light on how I can do this with an existing form?

 

You'll likely need code to calculate the difference between two dates.  Alternatively, you can use qRules to do this if you don't want to write code.  There is a DateDiff function that does exactly what you want.  More info on qRules here: http://www.qdabra.com/en/products/qRules_new.aspx