If I didn't get wrong,i think this helps:

Put this in worksheet's code.I assume the data is in Range("A1:C6")

Private Sub Workbook_SheetSelectionChange(ByVal Sh As Object, ByVal Target As
Range)
If(ActiveCell.Row<7) and (ActiveCell.Column=1 or ActiveCell.Column=2)
then
Range("C" & ActiveCell.Row).Select
Msgbox Selection.Value
'Delete Msgbox line and put the Code with using Selection
End If
End Sub