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

public class GraphicsPathIteratorDemo
   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 g As Graphics = e.Graphics

        Dim rect As New Rectangle(50, 50, 100, 50)

        Dim path As New GraphicsPath
        Dim ptsArray As PointF() = {New PointF(20, 20), New PointF(60, 12), New PointF(100, 20)}

        path.AddCurve(ptsArray)
        path.AddRectangle(rect)
        rect.Y += 60
        path.AddEllipse(rect)
        path.AddLine(120, 50, 220, 100)

        g.DrawPath(Pens.Blue, path)

        Dim pathIterator As New GraphicsPathIterator(path)

        Console.WriteLine("Total points = " & pathIterator.Count)
        Console.WriteLine("Sub paths = " & pathIterator.SubpathCount)

        pathIterator.Rewind()

        Dim i As Integer
        For i = 0 To pathIterator.SubpathCount - 1
            Dim strtIdx, endIdx As Integer
            Dim bClosedCurve As Boolean
            pathIterator.NextSubpath(strtIdx, endIdx, bClosedCurve)
            Console.WriteLine("Start Index = " & strtIdx)
            Console.WriteLine("End Index = " & endIdx)
            Console.WriteLine("IsClosed = " & bClosedCurve)
        Next i


  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