Private Sub Worksheet_SelectionChange(ByVal Target As Range)
Dim R1 As Range, rw As Long, cn As Long
Set R1 = Me.Range("G7:J9")
If Not Application.Intersect(R1, Target) Is Nothing Then
rw = Target.Row - R1.Row + 1
cn = Target.Column - R1.Column + 1
MsgBox ("ligne : " & rw & " - " & "colonne : " & cn)
End If
End Sub