VB.Net/2D/Fill Mode

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Fill Mode Demo

<source lang="vbnet"> Imports System Imports System.Collections Imports System.ruponentModel Imports System.Windows.Forms Imports System.Data Imports System.Configuration Imports System.Resources Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Imaging Imports System.Diagnostics Public Class MainClass

   Shared Sub Main()
       Dim myform As Form = New FillModesForm()
       Application.Run(myform)
   End Sub

End Class Public Class FillModesForm

   Inherits System.Windows.Forms.Form
  1. Region " Windows Form Designer generated code "
   Public Sub New()
       MyBase.New()
       "This call is required by the Windows Form Designer.
       InitializeComponent()
       "Add any initialization after the InitializeComponent() call
   End Sub
   "Form overrides dispose to clean up the component list.
   Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
       If disposing Then
           If Not (components Is Nothing) Then
               components.Dispose()
           End If
       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()
       components = New System.ruponentModel.Container()
       Me.Text = "FillModesForm"
   End Sub
  1. End Region
   Private Sub FillModesForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
       Dim g As Graphics = e.Graphics
       Dim x As Integer = 0
       Dim y As Integer = 0
       Dim width As Integer = Me.ClientRectangle.Width / 2
       Dim height As Integer = Me.ClientRectangle.Height
       Dim blackBrush As Brush = Brushes.Black
       Dim fillBrush As Brush = Brushes.Gray
       Dim whitePen As Pen = Pens.White
       Dim format As StringFormat = New StringFormat()
       format.Alignment = StringAlignment.Center
       format.LineAlignment = StringAlignment.Center
       Dim pen As Pen = New Pen(Color.Red, 4)
       Dim pointPen As Pen = New Pen(Color.Black, 3)
       pointPen.StartCap = pointPen.EndCap = LineCap.SquareAnchor
       Dim fill As FillMode = FillMode.Winding
       Dim points As PointF() = New PointF() {New PointF(x + 25, y + height - 25), New PointF(x + width - 25, y + height - 25), New PointF(x + 25, height / 2), New PointF(x + width - 25, y + 25), New PointF(x + 25, y + 25), New PointF(x + width - 25, height / 2)}
       g.DrawRectangle(Pens.Black, x, y, width, height)
       g.FillClosedCurve(fillBrush, points, fill)
       g.DrawClosedCurve(pen, points)
       Dim point As PointF
       For Each point In points
           g.DrawLine(pointPen, New Point(point.X, point.Y), New Point(point.X + 1, point.Y))
       Next
       Dim i As Integer
       For i = 0 To points.Length - 1
           g.DrawString(i.ToString(), Me.Font, blackBrush, points(i))
       Next
       x = IIf(x > Me.ClientRectangle.Width - 2 * width, 0, x + width)
       y = IIf(x = 0, y + height, y)
       fill = FillMode.Alternate
       points = New PointF() {New PointF(x + 25, y + height - 25), New PointF(x + width - 25, y + height - 25), New PointF(x + 25, height / 2), New PointF(x + width - 25, y + 25), New PointF(x + 25, y + 25), New PointF(x + width - 25, height / 2)}
       g.DrawRectangle(Pens.Black, x, y, width, height)
       g.FillClosedCurve(fillBrush, points, fill)
       g.DrawClosedCurve(pen, points)
       For Each point In points
           g.DrawLine(pointPen, New Point(point.X, point.Y), New Point(point.X + 1, point.Y))
       Next
       For i = 0 To points.Length - 1
           g.DrawString(i.ToString(), Me.Font, blackBrush, points(i))
       Next
       x = IIf(x > Me.ClientRectangle.Width - 2 * width, 0, x + width)
       y = IIf(x = 0, y + height, y)
       
   End Sub

End Class

      </source>