Private Sub ShowPensAndSmoothingMode(ByVal e As PaintEventArgs)

    ' Set the SmoothingMode property to smooth the line.
    e.Graphics.SmoothingMode = Drawing2D.SmoothingMode.AntiAlias

    ' Create a new Pen object.
    Dim greenPen As New Pen(Color.Green)

    ' Set the width to 6.
    greenPen.Width = 6.0F

    ' Set the DashCap to round.
    greenPen.DashCap = Drawing2D.DashCap.Round

    ' Create a custom dash pattern.
    greenPen.DashPattern = New Single() {4.0F, 2.0F, 1.0F, 3.0F}

    ' Draw a line.
    e.Graphics.DrawLine(greenPen, 20.0F, 20.0F, 100.0F, 240.0F)

    ' Change the SmoothingMode to none.
    e.Graphics.SmoothingMode = Drawing2D.SmoothingMode.None

    ' Draw another line.
    e.Graphics.DrawLine(greenPen, 100.0F, 240.0F, 160.0F, 20.0F)

    ' Dispose of the custom pen.
    greenPen.Dispose()
End Sub

' 导入命名空间
Imports System
Imports System.Windows.Forms
Imports System.Drawing
Imports System.Drawing.Drawing2D


Public Class MainClass

  Shared Sub Main()
     Dim form1 As Form1 = new Form1
     Application.Run(form1)
  End Sub
  
End Class

Public Class Form1
  Inherits System.Windows.Forms.Form

  Public Sub New()
    MyBase.New()

    Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
    Me.ClientSize = New System.Drawing.Size(504, 629)
    Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
    Me.Text = "Form1"

  End Sub

  Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
    Dim R1 As New Rectangle(10, 10, 40, 40)
    e.Graphics.SmoothingMode = SmoothingMode.HighQuality
    e.Graphics.ResetTransform()
    e.Graphics.TranslateTransform(200.0F, 50.0F)
    e.Graphics.DrawArc(Pens.DarkBlue, R1, 40, 160)
  End Sub
End Class