Using Excel VBA Events to detect merging/unmerging of cells?

Question

I am trying to find a way to detect the immediate use of merging (or unmerging) cells. The change event triggers nor does the selectionchange. I\'ve tried some of the other, but

Answer 1

I found my own kind of sort of work around to make the things happen that I wanted. Not sure if there is a more efficient/speedier way to do it, but it does at least work without any errors thus far. It triggers after the selection is changed which is slower than what I wanted but VBA is what it is.

For the worksheet:

Private Sub Worksheet_SelectionChange(ByVal Target As Range)
    Call EnforceFormatting(Target)
End Sub

In a module:

Public oldR As Range
Public newR As Range

Sub EnforceFormatting(ByVal Target As Range)
    Set newR = Target
    If oldR Is Nothing Then
        Set oldR = newR
        Exit Sub
    End If

    If oldR.Column < 3 Then
        Set oldR = newR
        Exit Sub
    End If
    If oldR.Row <> 3 And oldR.Row <> 7 And oldR.Row <> 11 Then
        Set oldR = newR
        Exit Sub
    End If
    If oldR.Rows.Count > 1 Then
        Set oldR = newR
        Exit Sub
    End If
    If oldR.Count > 1 Then
        Application.ScreenUpdating = False
        Dim c As Range
        For Each c In oldR
            c.Value = c.Text
        Next c
        Application.ScreenUpdating = True
    End If

    Set oldR = newR
End Sub