Action when linked cell of option button changes

I have a problem with my option buttons linked cells. I'd like to load a macro whenever the value of the linked cell changes. I tried two different methods, and none of them won't work when the button changes the value. If I type in a selected cell a value, my macros do load.

Here are my two techniques:

Private Cel_CONGESg As Byte
Private Sub Worksheet_Calculate()
Dim Ws As Worksheet

Set Ws = ThisWorkbook.Sheets("Externe")

If Ws.Range("$I$12").Value <> Cel_CONGESg Then
    MsgBox "heheheheeheheheheee"
End If

Cel_CONGESg = Ws.Range("$I$12").Value

End Sub

The second method

Private Sub Worksheet_Change(ByVal target As Range)
Dim CongesG
Dim Ws As Worksheet

Set CongesG = Ws.Range("$I$12")

If Not Application.Intersect(CongesG, Range(target.Address)) _
       Is Nothing Then
    If Ws.Range("$I$12").Value = 2 Or Ws.Range("$I$12").Value = 0 Then
        Ws.Range("$I$13").EntireRow.Hidden = True
            With Range("H12:L12").Borders(xlEdgeBottom)
                .LineStyle = xlDot
                .Color = RGB(51, 63, 79)
                .Weight = xlThin
            End With
    ElseIf Ws.Range("$I$12").Value = 1 Then
        Ws.Range("$I$13").EntireRow.Hidden = False
            With Range("H12:L12").Borders(xlEdgeBottom)
                .LineStyle = xlNone
            End With
    End If 'I12 Congés
End If 'Application intersect CongesG
End Sub

Could you please help me understand what's the problem?

Thank you in advance. Have a great day.

Jean

You are not using the full capabilities of the Worksheet_Change event, and Target, which is already defined as Range.

Try the code below:

Private Sub Worksheet_Change(ByVal Target As Range)

Dim CongesG As Range

Set CongesG = Range("$I$12")

If Not Application.Intersect(CongesG, Target) Is Nothing Then
    Application.EnableEvents = False
    Select Case Target.Value
        Case 2, 0
            Target.Offset(1).EntireRow.Hidden = True
            With Range("H12:L12").Borders(xlEdgeBottom)
                .LineStyle = xlDot
                .Color = RGB(51, 63, 79)
                .Weight = xlThin
            End With
        Case 1
            Target.Offset(1).EntireRow.Hidden = False
            With Range("H12:L12").Borders(xlEdgeBottom)
                .LineStyle = xlNone
            End With
    End Select
End If 'Application intersect CongesG
Application.EnableEvents = True

End Sub