String property to set or get the Item Class ID in the PrtGroup object. Used in conjunction with the PrtGroup.GetItemList method to retrieve a list of all items of a particular item class in a Tracking Group.
Dim main as new Prtgroup
main.Id = "MAIN"
' Get a list of items with an item class id "CARRIER" from the
' group "MAIN" and display them one by one in a message box.
main.ItemClassId = "CARRIER"
for j = 0 to main.ItemCount - 1
PRT Object Model member list.