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

public class UsePointF
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class

public class Form1
  Inherits System.Windows.Forms.Form

  Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
        Dim pt As New PointF(50.0F, 50.0F)

        Dim newPoint As PointF = PointF.Empty

        newPoint.X = 100.0F
        newPoint.Y = 200.0F

        Dim g As Graphics = Graphics.FromHwnd(Me.Handle)

        Dim pn As New Pen(Color.Blue, 4)


        g.DrawLine(pn, pt, newPoint)

        pn.Dispose()
        g.Dispose()
  End Sub

  Public Sub New()
   
    MyBase.New()
    Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
    Me.ClientSize = New System.Drawing.Size(292, 273)
    Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen

  End Sub

End Class