'Declaration Public Class UltraCalcFunctionNetWorkDays Inherits BuiltInFunctionBase
public class UltraCalcFunctionNetWorkDays : BuiltInFunctionBase
NETWORKDAYS(startDate, endDate [, holiday1, holiday2, ..., holidayN])
StartDate is the date from which to start.
EndDate is the date at which to end.
Holiday1, holiday2, ..., holidayN is any number of dates or range references containing dates that are to be considered non-working days.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2