'**********************************************************
'Declarations section of the module
'**********************************************************
Option Explicit
'==========================================================
' The DateAddW() function provides a workday substitute
' for DateAdd("w", number, date). This function performs
' error checking and ignores fractional Interval values.
'==========================================================
Function DateAddW(ByVal TheDate, ByVal Interval)
Dim Weeks As Long, OddDays As Long, Temp As String
If VarType(TheDate) <> 7 Or VarType(Interval) < 2 Or _
VarType(Interval) > 5 Then
DateAddW = TheDate
ElseIf Interval = 0 Then
DateAddW = TheDate
ElseIf Interval > 0 Then
Interval = Int(Interval)
' Make sure TheDate is a workday (round down).
Temp = Format(TheDate, "ddd")
If Temp = "Sun" Then
TheDate = TheDate - 2
ElseIf Temp = "Sat" Then
TheDate = TheDate - 1
End If
' Calculate Weeks and OddDays.
Weeks = Int(Interval / 5)
OddDays = Interval - (Weeks * 5)
TheDate = TheDate + (Weeks * 7)
' Take OddDays weekend into account.
If (DatePart("w", TheDate) + OddDays) > 6 Then
TheDate = TheDate + OddDays + 2
Else
TheDate = TheDate + OddDays
End If
DateAddW = TheDate
Else ' Interval is < 0
Interval = Int(-Interval) ' Make positive & subtract later.
' Make sure TheDate is a workday (round up).
Temp = Format(TheDate, "ddd")
If Temp = "Sun" Then
TheDate = TheDate + 1
ElseIf Temp = "Sat" Then
TheDate = TheDate + 2
End If
' Calculate Weeks and OddDays.
Weeks = Int(Interval / 5)
OddDays = Interval - (Weeks * 5)
TheDate = TheDate - (Weeks * 7)
' Take OddDays weekend into account.
If (DatePart("w", TheDate) - OddDays) < 2 Then
TheDate = TheDate - OddDays - 2
Else
TheDate = TheDate - OddDays
End If
DateAddW = TheDate
End If
End Function