[RESOLVED] how do i get the total duration from 2 subitems

hey,
i am trying how to get the total duration from 2 subitems
E.X

this of course are date/time values
LsvwTreats.ListItems(X).SubItems(1) = 10:00
LsvwTreats.ListItems(X).SubItems(2) = 10:30
so the total duration is 30 minutes

LsvwTreats.ListItems(X).SubItems(1) = 09:00
LsvwTreats.ListItems(X).SubItems(2) = 11:00
so the total duration is 120 minutes

and so on...

tnx for any help
salsa :)