Sub exemple()
[A1] = 1600: [A1:A5].DataSeries: [A9:A11] = Application.UserName: [A15:A20] = "=ROW()"
MsgBox Range("A2", Range("A2").End(xlDown)).Address, vbCritical, "Achtung, Baby!"
MsgBox Range([A2], Cells(Rows.Count, "A").End(xlUp)).Address, vbInformation, "And Now for Something Completely Different"
End Sub