Creating Appointments and Meeting Requests
You can add an appointment to your calendar and request that others join you by sending them meeting requests. You add an appointment by creating a Collaboration Data Objects (CDO) Appointment object, setting information about the appointment by using the object, and then saving the item to a folder. You create a meeting request from the Appointment object by using the CreateRequest method of the IAppointment interface. CDO creates a special message within a CalendarMessage object that you then send to attendees to invite them to the appointment.