I am trying to calculate age using Outlook 2002 SP3, but it does not appear to work using dd/mm/yyyy. The code that I am using is;

IIf([Birthday]<>"None",DateDiff("yyyy",[Birthday],Date())-IIf(DateDiff("d",CDate(Month([Birthday]) & "/" & Day([Birthday]) & "/" & Year(Date())),Date())<0,1,0),"")

Any suggestions?