Update excel cell with date if a cell in a range is update - excel

Question

I need to update a cell with the date and time stamp (NOW()) if any cell is updated within any cell before it within that same row.
So update cell "CU" with date and time when any cell from "A-CR" is updated.
I have done some searching but I can only seem to find bits that work if only updating a single cell, I'm looking for if anything changes within that range.
I currently have some Vba which does something similar which will update the adjacent cell with time and date which is required but I also need an overall one for the whole process.
Private Sub Worksheet_Change(ByVal Target As Range)
If Not Intersect(Target, Range("F:F, I:I, L:L, O:O, R:R, U:U, X:X, AA:AA, AB:AB, AE:AE, AH:AH, AK:AK, AN:AN, AQ:AQ, AT:AT, AW:AW, AZ:AZ, BC:BC, BF:BF, BI:BI, BL:BL, BO:BO, BR:BR, BU:BU, BX:BX, CA:CA, CD:CD, CG:CG, CJ:CJ, CM:CM, CP:CP")) Is Nothing Then
On Error GoTo safe_exit
With Application
.EnableEvents = False
.ScreenUpdating = False
Dim trgt As Range, ws1 As Worksheet
'Set ws1 = ThisWorkbook.Worksheets("Info")
For Each trgt In Intersect(Target, Range("F:F, I:I, L:L, O:O, R:R, U:U, X:X, AA:AA, AB:AB, AE:AE, AH:AH, AK:AK, AN:AN, AQ:AQ, AT:AT, AW:AW, AZ:AZ, BC:BC, BF:BF, BI:BI, BL:BL, BO:BO, BR:BR, BU:BU, BX:BX, CA:CA, CD:CD, CG:CG, CJ:CJ, CM:CM, CP:CP"))
If trgt <> vbNullString Then
If UCase(trgt.Value) = "Y" Or UCase(trgt.Value) = "N" Then
Cells(trgt.Row, trgt.Column + 1) = Now()
Cells(trgt.Row, trgt.Column + 2) = Environ("username")
'Select Case trgt.Column
' Case 2 'column B
' Cells(trgt.Row, trgt.Column + 1) = Environ("username")
' Case 4 'column D
' 'do something else
' End Select
Else
trgt = ""
Cells(trgt.Row, trgt.Column + 1) = ""
Cells(trgt.Row, trgt.Column + 2) = ""
End If
End If
Next trgt
'Set ws1 = Nothing
End With
End If
safe_exit:
Application.EnableEvents = True
Application.ScreenUpdating = True
End Sub

Answer 1

This works for me:
Option Explicit
Private Sub Worksheet_Change(ByVal Target As Range)
Application.EnableEvents = False
If Intersect(Target, Me.Range("A" & Target.Row & ":CR" & Target.Row)) Is Nothing Then GoTo SafeExit
Me.Cells(Target.Row, "CU") = Now()
SafeExit:
Application.EnableEvents = True
End Sub

Answer 2

The below code takes care of:
Clearing the time if the row is blank.
Updating the time only if the values really change from the previous value.
Dim oldValue As String
'Change the range below where your data will be
Const RangeString = "A:CR"
'Below variable decides the column in which date will be displayed
'Change the below value to 1 for column A, 2 for B, ... 99 for CU
Const ColumnIndex = 99
Private Sub Worksheet_Change(ByVal Target As Range)
Dim WorkRng As Range
Dim HorizontalRng As Range
Dim Rng As Range
Dim HorRng As Range
Dim RowHasVal As Boolean
Set WorkRng = Intersect(ActiveSheet.Range(RangeString), Target)
If Not WorkRng Is Nothing Then
If WorkRng.Cells.Count = 1 And WorkRng.Cells(1, 1).Value = oldValue Then
Exit Sub
End If
Application.EnableEvents = False
For Each Rng In WorkRng
Set HorizontalRng = Intersect(ActiveSheet.Range(RangeString), Rows(Rng.Row))
RowHasVal = False
For Each HorRng In HorizontalRng
If Not VBA.IsEmpty(HorRng.Value) Then
RowHasVal = True
Exit For
End If
Next
If Not RowHasVal Then
ActiveSheet.Cells(Rng.Row, ColumnIndex).ClearContents
ElseIf Not VBA.IsEmpty(Rng.Value) Then
ActiveSheet.Cells(Rng.Row, ColumnIndex).Value = Now
ActiveSheet.Cells(Rng.Row, ColumnIndex).NumberFormat = "dd-mm-yyyy, hh:mm:ss"
End If
Next
Application.EnableEvents = True
End If
End Sub
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
If Not Intersect(Target, ActiveSheet.Range(RangeString)) Is Nothing Then
If Target.Cells.Count = 1 Then
oldValue = Target.Value
Else
oldValue = ""
End If
End If
End Sub