XL97: Sample Code to Use a Date Range with NETWORKDAYS

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 Function DateSpan(BegDate As Date, EndDate As Date) As Variant
    Dim DateArray() As Variant, i As Integer, Span As Integer
    BegDate = DateValue(BegDate)
    EndDate = DateValue(EndDate)
    Span = EndDate - BegDate + 1
    ReDim DateArray(1 To Span)
    For i = 1 To Span
       DateArray(i) = BegDate + i - 1
    Next
    DateSpan = DateArray
				

End Function

Example Using the Function with Networkdays

This example will return the number of workdays (weekdays) between December 1, 1998 and January 1, 1999 with the dates between December 24 and January 1 indicated as holidays.

NOTE: Before using the Networkdays function, you must install the Analysis Toolpak add-in.

1. In a new workbook, type the custom function DateSpan (illustrated above) into a new module sheet.
   
   For additional information, please see the following article in the Microsoft Knowledge Base:

   173707 OFF97: How to Run Sample Code from Knowledge Base Articles

2. In Sheet1, type the following formula into cell A1:

         =NETWORKDAYS(DATEVALUE("12/1/98"), DATEVALUE("1/1/99"),
          DateSpan("12/24/98","1/1/99"))
   						

The result will be 17 days, the number of days excluding weekends and holidays between the specified date range.