had made updates to my reply. What I still didn't clearly understood is what you store. If it's 45 ok 45 but what if say "01:30" or your spinner simply gets 'minutes'? Assuming the latter:

lnBaseValue = 45
ltStart = dtot(date())+m.lnBaseValue*60
ltEnd = m.ltStart + 10 * 60
between(datetime(), m.ltStart, m.ltEnd)


Cetin,
Im actually storing the whole time.. so for the 1245AM, i will get 45 and it the user set this to 135PM, i'd get 1335.