Slette Item eller opdater Item

Const olContactItem = 2
Dim objOutl, objContact
Set objOutl = WScript.CreateObject("Outlook.Application")
Set objContact = objOutl.CreateItem(olContactItem)
objContact.FirstName = "john"
objContact.LastName  = "smith"
objContact.Email1Address = "john@world.com"
objContact.CompanyName = "Bedsted"
objContact.Save()

Her kode til at oprette - men hvordan hvis opdater eller slette ?