Excel VBA Comment Query - vba

Question

So I have tried and failed many times to do this.
I'm trying to write a VBA script that when run will insert a comment in the active cell that says:
[Surname], [First Name]
[Todays date] was [current cell value]
Surnames and First Names should be bold.
If the cell is edited again it would edit the comment and put the above format below the previous comment.
Here is what I have at the moment (bearing in mind it could be very wrong)
Sub Test()
Dim UserN As String
Dim commt As String
Dim cmt As Comment
UserN = Application.UserName
Set cmt = ActiveCell.Comment
If ActiveCell.Comment Is Nothing Then
commt = UserN & Chr(10) & Chr(10) _
& Chr(10) & Format(Now, strDate) & " was £" & ActiveCell
With Selection
With Cells(Selection.Row, Selection.Column)
.ClearComments
.AddComment
.Comment.Visible = False
.Comment.Shape.AutoShapeType = msoShapeRoundedRectangle
.Comment.Text Text:=commt
With .Comment.Shape.TextFrame
' Username
With .Characters(1, Len(UserN)).Font
.Bold = True
End With
With .Characters.Font
.Size = 12
End With
End With
.Comment.Shape.TextFrame.AutoSize = True
End With
End With
Else
commt.txt = commt.txt & Chr(10) UserN & Chr(10) & Chr(10)
& Chr(10) & Format(Now, strDate) & " was £" & ActiveCell
With Selection
With Cells(Selection.Row, Selection.Column)
.ClearComments
.AddComment
.Comment.Visible = False
.Comment.Shape.AutoShapeType = msoShapeRoundedRectangle
.Comment.Text Text:=commt
With .Comment.Shape.TextFrame
' Username
With .Characters(1, Len(UserN)).Font
.Bold = True
End With
With .Characters.Font
.Size = 12
End With
End With
.Comment.Shape.TextFrame.AutoSize = True
End With
End With
End If
End Sub

Answer 1

I think the only major issue is with this line:
commt.txt = commt.txt & Chr(10) UserN & Chr(10) & Chr(10)
& Chr(10) & Format(Now, strDate) & " was £" & ActiveCell
It is using the variable 'commt' as if it were a comment object, but is simply a string. It's also missing a '&' and a '_' line separator. I believe the line should be:
commt = cmt.text & Chr(10) & UserN & Chr(10) & Chr(10) & Chr(10) & Format(Now, strDate) & " was £" & ActiveCell