Duration: Numeric value specifying the duration, in milliseconds, to be formatted.

Duration Format: Text string specifying the format of the function result. This string may contain 0 or more of the characters d, s, and . (for example ds) indicating that days, seconds, or milliseconds are to be included, in addition to hours and minutes, in the returned string. If no Duration Format is specified, the string is returned in the form exemplified by 15:32 (hours:minutes).