True if the date and time object contains automatically updated information; False if the date and time is a fixed string. Read/write Long.
Remarks
This property applies only to a HeaderFooter object that represents a date and time (returned by the DateAndTime property). Set the UseFormat property of a date and time HeaderFooter object to True when you want to set or return the date and time format by using the Format property. Set the UseFormat property to False when you want to set or return the text string for the fixed date and time.