Description: Extracts the ISO day of week from a Delphi date/time value, where Monday is 1 and Sunday is 7.
Calling convention: CIP_ExtractDayOfTheWeek(Date: Double): Word
Parameters:
Date: Delphi date/time value.
Returns: ISO weekday number as Word, or NULL for NULL input.
Availability: Default.
Example:
WeekDay := CIP_ExtractDayOfTheWeek(Now());