>>658
'何か入力済のセルにオートシェイプで下線を引く
Sub Macro1()
  For Each c In ActiveSheet.UsedRange
    If c.Text <> "" Then Call セルに下線(c.Row, c.Column)
  Next
End Sub

Sub セルに下線(r, c)
  x1 = Cells(1, c).Left
  x2 = Cells(1, c + 1).Left
  y1 = Cells(r + 1, 1).Top
  y2 = y1
  ActiveSheet.Shapes.AddConnector(msoConnectorStraight, x1, y1, x2, y2).Select
  With Selection.ShapeRange.Line
    .ForeColor.RGB = RGB(0, 0, 0)  '黒
    .Weight = 0.75  '太さpt
  End With
End Sub