probably you need "AppointItemData"

u can use like this

get_Appointment_ID= thisform.ctMDay1.AppointItemData(nindex)

if you have ctmday.hlp u can find good sample over there


also you will need this command set

nStart = thisform.ctMDay1.AppointTimeStart(nindex) timestart
nEnd = thisform.ctMDay1.AppointTimeEnd(nindex) timeend
nDate = thisform.ctMDay1.AppointDate(nindex) date() - Ctod("01/01/1900")
nColumn= thisform.ctMDay1.SelectColumn() selected column