VB.Net/2D/Pen Alignment

PenAlignment.Center Demo

<source lang="vbnet"> Imports System.Drawing.Drawing2D Imports System Imports System.Drawing.Text Imports System.Drawing Imports System.Windows.Forms Imports System.Math Public Class MainClass

  Shared Sub Main()
      Dim form1 As Form = New Form1()
      Application.Run(form1)
  End Sub 

End Class

Public Class Form1

   Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
       Dim x As Integer = 25
       Dim y As Integer = 25
       Const WID As Integer = 100
       Dim the_pen As New Pen(Color.White, 20)
       Dim rect As New Rectangle(x, y, WID, WID)
       the_pen.Alignment = PenAlignment.Center
       Dim pts() As Point = { _
            New Point(x, y), _
            New Point(x + WID \ 2, y), _
            New Point(x + WID, y + WID), _
            New Point(x, y + WID \ 2) _
       }
       e.Graphics.DrawArc(the_pen, x, y, WID, WID, 0, 180)
       e.Graphics.DrawArc(Pens.Black, x, y, WID, WID, 0, 180)
   End Sub

End Class

<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1

   Inherits System.Windows.Forms.Form
   "Form overrides dispose to clean up the component list.
   <System.Diagnostics.DebuggerNonUserCode()> _
   Protected Overloads 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(200, 200)
       Me.Name = "Form1"
       Me.Text = ""
       Me.ResumeLayout(False)
   End Sub

End Class

      </source>

PenAlignment.Outset Demo

<source lang="vbnet"> Imports System.Drawing.Drawing2D Imports System Imports System.Drawing.Text Imports System.Drawing Imports System.Windows.Forms Imports System.Math Public Class MainClass

  Shared Sub Main()
      Dim form1 As Form = New Form1()
      Application.Run(form1)
  End Sub 

End Class

Public Class Form1

   Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
       Dim x As Integer = 25
       Dim y As Integer = 25
       Const WID As Integer = 100
       Dim the_pen As New Pen(Color.White, 20)
       Dim rect As New Rectangle(x, y, WID, WID)
       the_pen.Alignment = PenAlignment.Outset
       Dim pts() As Point = { _
            New Point(x, y), _
            New Point(x + WID \ 2, y), _
            New Point(x + WID, y + WID), _
            New Point(x, y + WID \ 2) _
       }
       
       e.Graphics.DrawEllipse(the_pen, rect)
       e.Graphics.DrawEllipse(Pens.Black, rect)
       
       e.Graphics.DrawArc(the_pen, x, y, WID, WID, 0, 180)
       e.Graphics.DrawArc(Pens.Black, x, y, WID, WID, 0, 180)
   End Sub

End Class

<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1

   Inherits System.Windows.Forms.Form
   "Form overrides dispose to clean up the component list.
   <System.Diagnostics.DebuggerNonUserCode()> _
   Protected Overloads 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(200, 200)
       Me.Name = "Form1"
       Me.Text = ""
       Me.ResumeLayout(False)
   End Sub

End Class

      </source>