a = CTOD("29/03/1963")
 b = CTOD("25/09/2004")


NumYear = Year(b)-Year(a)
NumMonth = Month(b)-Month(a)
NumDay = Day(b) - Day(a)

If NumDay < 0
NumMonth = NumMonth - 1
Numday = (Gomonth(a,1)-Day(Gomonth(a,1)) - a )+ Day(b) 
EndIf 
If NumMonth < 0
NmYear = NumYear - 1
NumMonthi = Abs(NumMonth)
EndIf 

? NumYear, NumMonth, NumDay