The TimeCreated property specifies the date/time the message was first saved. Read-only.
objMessage.TimeCreated
Variant (vbDate format)
AppointmentItem objects in a Microsoft® Schedule+ calendar folder do not have the full set of attributes of a general message. If you obtain the default calendar folder by passing CdoDefaultFolderCalendar to the Session object's GetDefaultFolder method, its appointments have no defined value for the TimeCreated property. An attempt to access TimeCreated in this case returns CdoE_NOT_FOUND.
The TimeCreated property corresponds to the MAPI property PR_CREATION_TIME.