Amount of full years between dates
Function CalcAge(dteStart As Date, dteEnd As Date) As Long
Dim lngAge As Long
lngAge = DateDiff("yyyy", dteStart, dteEnd)
If DateSerial(Year(dteEnd), Month(dteStart), Day(dteStart)) > dteEnd Then
lngAge = lngAge - 1
End If
CalcAge = lngAge...