Update a legend format with SymbologyControl area and line patches
SymbolForm.vb
' Copyright 2012 ESRI
' 
' All rights reserved under the copyright laws of the United States
' and applicable international laws, treaties, and conventions.
' 
' You may freely redistribute and use this sample code, with or
' without modification, provided you include the original copyright
' notice and use restrictions.
' 
' See the use restrictions.
' 

Imports ESRI.ArcGIS.Display

Public Class Form2
  Inherits System.Windows.Forms.Form
  Private m_styleGalleryItem As IStyleGalleryItem

#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.ComponentModel.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.
  Friend WithEvents AxSymbologyControl1 As ESRI.ArcGIS.Controls.AxSymbologyControl
  Friend WithEvents Button1 As System.Windows.Forms.Button
  Friend WithEvents Button2 As System.Windows.Forms.Button
  <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(Form2))
        Me.AxSymbologyControl1 = New ESRI.ArcGIS.Controls.AxSymbologyControl
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        CType(Me.AxSymbologyControl1, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'AxSymbologyControl1
        '
        Me.AxSymbologyControl1.Anchor = CType(((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
        Me.AxSymbologyControl1.Location = New System.Drawing.Point(0, 0)
        Me.AxSymbologyControl1.Name = "AxSymbologyControl1"
        Me.AxSymbologyControl1.OcxState = CType(resources.GetObject("AxSymbologyControl1.OcxState"), System.Windows.Forms.AxHost.State)
        Me.AxSymbologyControl1.Size = New System.Drawing.Size(267, 280)
        Me.AxSymbologyControl1.TabIndex = 0
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(104, 288)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(75, 23)
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "OK"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(184, 288)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(75, 23)
        Me.Button2.TabIndex = 2
        Me.Button2.Text = "Cancel"
        '
        'Form2
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(264, 316)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.AxSymbologyControl1)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog
        Me.Name = "Form2"
        Me.Text = "Symbol Form"
        CType(Me.AxSymbologyControl1, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        'Get the ArcGIS install location
        Dim sInstall As String
        sInstall = ESRI.ArcGIS.RuntimeManager.ActiveRuntime.Path

        'Load the ESRI.ServerStyle file into the SymbologyControl
        AxSymbologyControl1.LoadStyleFile(sInstall + "\\Styles\\ESRI.ServerStyle")

    End Sub

    Public Function GetItem(ByVal styleClass As ESRI.ArcGIS.Controls.esriSymbologyStyleClass) As IStyleGalleryItem

        m_styleGalleryItem = Nothing
        'Disable ok button
        Button1.Enabled = False

        'Set the style class of SymbologyControl1
        AxSymbologyControl1.StyleClass = styleClass
        'Unselect any selected item in the current style class
        AxSymbologyControl1.GetStyleClass(styleClass).UnselectItem()

        'Show the modal form
        Me.ShowDialog()

        'Return the label style that has been selected from the SymbologyControl
        Return m_styleGalleryItem

    End Function

    Private Sub AxSymbologyControl1_OnItemSelected(ByVal sender As Object, ByVal e As ESRI.ArcGIS.Controls.ISymbologyControlEvents_OnItemSelectedEvent) Handles AxSymbologyControl1.OnItemSelected

        'Get the selected item
        m_styleGalleryItem = AxSymbologyControl1.GetStyleClass(AxSymbologyControl1.StyleClass).GetSelectedItem()
        'enable ok button
        Button1.Enabled = True

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        'hide the form
        Me.Hide()

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

        m_styleGalleryItem = Nothing
        'hide the form
        Me.Hide()

    End Sub

End Class