Worksheet_Change Event only when call value changes - excel

Question

I want the user's name and the date to be entered into a specified column when any change is made.
I also have a snippet of code that forces any data that is pasted into the sheet to be pasted as values so the sheet's formatting is maintained.
I was able to write code that functioned properly, but the event was also being triggered even when the user double clicked in a cell and clicked out of the cell (i.e., no change was made). A user could accidentally click into a cell and leave it without making changes, but their name would be left behind as having made an edit.
I tried to incorporate this solution. Here is a simplified version of my code:
Private Sub Worksheet_Change(ByVal Target as Range)
Dim DesiredRange as Range
Dim TOld, TNew as String
Set DesiredRange as 'Whatever range I'm using
If Not Intersect(Target, DesiredRange) is Nothing Then
TNew = Target.Value
With Application
.EnableEvents = False
.Undo
End With
TOld = Target.Value
Target.Value = TNew
If Application.CutCopyMode = xlCopy Then
Application.EnableEvents = False
Application.Undo
Target.PasteSpecial Paste:=xlPasteValues
Application.EnableEvents = True
End if
If TOld <> TNew Then
Target.Offset(0, 23 - Target.Column) = Application.Username & vbNewLine & Date
End If
Application.EnableEvents = True
End if
End Sub
I am encountering the following issue:
When a user double clicks into a cell and clicks into another cell, the event is not triggered (i.e., the user's name and date is not left in the cell) but the active cell is reverted into the original cell, rather than the one they clicked into after double-clicking.
So a user would double click into a cell, do nothing, then click into another cell, and the active cell would revert to the first cell they were in.
This is also happening after the user inputs their change into the cell and presses enter.
I also encounter an error when something is pasted into the sheet, causing the code to not execute properly.

Answer 1

Prevent Worksheet Change When No Change
Option Explicit
Private Sub Worksheet_Change(ByVal Target As Range)
On Error GoTo ClearError
Dim srg As Range: Set srg = Range("B5:E10")
Dim irg As Range: Set irg = Intersect(srg, Target)
If irg Is Nothing Then Exit Sub
Dim coll As Collection: Set coll = New Collection
Dim iCell As Range
For Each iCell In irg.Cells
coll.Add iCell.Value
Next iCell
With Application
.EnableEvents = False
.Undo
End With
Dim drg As Range
Dim n As Long
For Each iCell In irg.Cells
n = n + 1
If iCell.Value <> coll(n) Then
iCell.Value = coll(n) ' write different value
If drg Is Nothing Then ' combine the cells for user and date
Set drg = iCell
Else
Set drg = Union(drg, iCell)
End If
End If
Next iCell
If Not drg Is Nothing Then
' Use 'Now' while testing or you will see no difference.
' Later switch to 'Date'.
Intersect(drg.EntireRow, Columns("W")).Value = Application.UserName _
& vbNewLine & Format(Now, "mm/dd/yyyy hh:mm:ss") ' Date
End If
SafeExit:
If Not Application.EnableEvents Then Application.EnableEvents = True
Exit Sub
ClearError:
Debug.Print "Run-time error '" & Err.Number & "': " & Err.Description
Resume SafeExit
End Sub