VB.Net Tutorial/2D Graphics/FillMode

Draw star with Drawing2D.FillMode.Alternate

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class DrawStart5Alternate
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
Public Class Form1
    Private Sub Form1_Paint(ByVal sender As Object, _
          ByVal e As System.Windows.Forms.PaintEventArgs) _
          Handles Me.Paint
        Dim canvas As Graphics = e.Graphics
        Dim starPoints(4) As Point
        Dim angle As Double
        Dim radians As Double
        Dim pointX As Double
        Dim pointY As Double
        Dim counter As Integer
        Const pointDistance As Double = 50
        Const angleStart As Integer = 198
        Const angleRotation As Integer = 144
        angle = angleStart
        For counter = 0 To 4
            angle += angleRotation
            radians = angle * Math.PI / 180
            pointX = Math.Cos(radians) * pointDistance +200
            pointY = Math.Sin(radians) * pointDistance +200
            starPoints(counter) = New Point(CInt(pointX), CInt(pointY))
        Next counter
        canvas.FillPolygon(Brushes.DarkRed, starPoints, Drawing2D.FillMode.Alternate)
    End Sub
End Class

<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.IContainer
    "NOTE: The following procedure is required by the Windows Form Designer
    "It can be modified using the Windows Form Designer.  
    "Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.SuspendLayout()
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(469, 387)
        Me.Name = "Form1"
        Me.Text = "Redrawing by Invalidating"
        Me.ResumeLayout(False)
    End Sub
End Class

Draw star with Drawing2D.FillMode.Winding

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class DrawStart5Winding
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
Public Class Form1
    Private Sub Form1_Paint(ByVal sender As Object, _
          ByVal e As System.Windows.Forms.PaintEventArgs) _
          Handles Me.Paint
        Dim canvas As Graphics = e.Graphics
        Dim starPoints(4) As Point
        Dim angle As Double
        Dim radians As Double
        Dim pointX As Double
        Dim pointY As Double
        Dim counter As Integer
        Const pointDistance As Double = 50
        Const angleStart As Integer = 198
        Const angleRotation As Integer = 144
        angle = angleStart
        For counter = 0 To 4
            angle += angleRotation
            radians = angle * Math.PI / 180
            pointX = Math.Cos(radians) * pointDistance +200
            pointY = Math.Sin(radians) * pointDistance +200
            starPoints(counter) = New Point(CInt(pointX), CInt(pointY))
        Next counter
        canvas.FillPolygon(Brushes.DarkRed, starPoints, Drawing2D.FillMode.Winding)
    End Sub
End Class

<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.IContainer
    "NOTE: The following procedure is required by the Windows Form Designer
    "It can be modified using the Windows Form Designer.  
    "Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.SuspendLayout()
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(469, 387)
        Me.Name = "Form1"
        Me.Text = "Redrawing by Invalidating"
        Me.ResumeLayout(False)
    End Sub
End Class