Adding one month: I know that I can add a certain number of days to today's date using the notation "&V[today+30_m/d/y]". But I would like to add exactly one calendar month. So if we are in month 11/2011, I would like to obtain month 12/2011. Is something like this possible?

Please use

  Set V[year]  "&V[today_y]"
  Set V[month] "&V[today_m]" + 1

  if V[month=13]
     Set V[month] "1"
     Set V[year]  "&V[year]" + 1