You can use the picture function to map it to the proper date format and then use the CTime() function to convert it to a time data type.
CTime(Picture({field}, "xx:xx:xx"))
Then use the DateAdd() function to do calculations on the field.
I have all the Crystal Reports functions documented with sample code in Chapter 6 of my
Crystal Reports Encyclopedia book
Edited by BrianBischof - 28 Nov 2007 at 1:56pm