PadLeft メソッドの使い方について

Private Sub pd_PrintPage(ByVal sender As Object, _

   ByVal e As System.Drawing.Printing.PrintPageEventArgs)

   Dim x As Integer = 100 '----印刷開始位置

   Dim y As Integer = 50

   Dim f As Font = New Font("ＭＳ Ｐゴシック", 11) '---フォント指定

   Dim pi As Integer = f.Height + 3 '---印刷ピッチ

   Dim ct As Integer = 0 '------------行カウンター

   Dim NN As Integer '--------------印刷数字

       

   NN = 1234567

   e.Graphics.DrawString(NN.ToString("#,##0").PadLeft(20), f, Brushes.Black, x , y )

   NN = 123456

   e.Graphics.DrawString(NN.ToString("#,##0").PadLeft(20), f, Brushes.Black, x, y + (pi * 1))

   NN = 1234

   e.Graphics.DrawString(NN.ToString("#,##0").PadLeft(20), f, Brushes.Black, x , y + (pi * 2))

   NN = 123

   e.Graphics.DrawString(NN.ToString("#,##0").PadLeft(20), f, Brushes.Black, x , y + (pi * 3))

   NN = 12

   e.Graphics.DrawString(NN.ToString("#,##0").PadLeft(20), f, Brushes.Black, x , y + (pi * 4))

   NN = 0

   e.Graphics.DrawString(NN.ToString("#,##0").PadLeft(20), f, Brushes.Black, x , y + (pi * 5))

   e.HasMorePages = False 

   img.Dispose() 

End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As _

        System.EventArgs) Handles Sub Button1.Click

        Dim pd As New System.Drawing.Printing.PrintDocument 

        AddHandler pd.PrintPage, AddressOf pd_PrintPage 

        pd.Print()

End Sub