How to edit all the records in the detail View when a master row's value...

Imports Microsoft.VisualBasic
Imports System
Imports System.Drawing
Imports System.Collections
Imports System.ComponentModel
Imports System.Windows.Forms
Imports System.Data
Imports DevExpress.XtraEditors
Imports DevExpress.XtraGrid.Views.Grid


Namespace WindowsApplication1
    ''' <summary>
 ''' Summary description for Form1.
 ''' </summary>
    Public Class Form1
        Inherits System.Windows.Forms.Form
        Private gridControl1 As DevExpress.XtraGrid.GridControl
        Private WithEvents gridView1 As DevExpress.XtraGrid.Views.Grid.GridView
        Private components As System.ComponentModel.IContainer

        Public Sub New()
            '
            ' Required for Windows Form Designer support
            '
            InitializeComponent()

            '
            ' TODO: Add any constructor code after InitializeComponent call
            '
        End Sub

        ''' <summary>
  ''' Clean up any resources being used.
  ''' </summary>
        Protected Overrides Overloads Sub Dispose(ByVal disposing As Boolean)
            If disposing Then
                If components IsNot Nothing Then
                    components.Dispose()
                End If
            End If
            MyBase.Dispose(disposing)
        End Sub

        #Region "Windows Form Designer generated code"
''' <summary>
  ''' Required method for Designer support - do not modify
  ''' the contents of this method with the code editor.
  ''' </summary>
        Private Sub InitializeComponent()
            Me.gridControl1 = New DevExpress.XtraGrid.GridControl()
            Me.gridView1 = New DevExpress.XtraGrid.Views.Grid.GridView()
            CType(Me.gridControl1, System.ComponentModel.ISupportInitialize).BeginInit()
            CType(Me.gridView1, System.ComponentModel.ISupportInitialize).BeginInit()
            Me.SuspendLayout()
            ' 
            ' gridControl1
            ' 
            Me.gridControl1.Dock = System.Windows.Forms.DockStyle.Fill
            Me.gridControl1.MainView = Me.gridView1
            Me.gridControl1.Name = "gridControl1"
            Me.gridControl1.Size = New System.Drawing.Size(480, 270)
            Me.gridControl1.TabIndex = 0
            Me.gridControl1.Text = "gridControl1"
            ' 
            ' gridView1
            ' 
            Me.gridView1.GridControl = Me.gridControl1
            Me.gridView1.Name = "gridView1"
'   Me.gridView1.ShownEditor += New System.EventHandler(Me.gridView1_ShownEditor);
            ' 
            ' Form1
            ' 
            Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
            Me.ClientSize = New System.Drawing.Size(480, 270)
            Me.Controls.AddRange(New System.Windows.Forms.Control() { Me.gridControl1})
            Me.Name = "Form1"
            Me.Text = "Form1"
'   Me.Load += New System.EventHandler(Me.Form1_Load);
            CType(Me.gridControl1, System.ComponentModel.ISupportInitialize).EndInit()
            CType(Me.gridView1, System.ComponentModel.ISupportInitialize).EndInit()
            Me.ResumeLayout(False)

        End Sub
        #End Region

        ''' <summary>
  ''' The main entry point for the application.
  ''' </summary>
        <STAThread> _
        Shared Sub Main()
            Application.Run(New Form1())
        End Sub

        Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
            Dim mTable As New DataTable()
            mTable.Columns.Add("ID", GetType(Integer))
            mTable.Columns.Add("check", GetType(Boolean))
            mTable.Columns.Add("data", GetType(String))

            Dim dTable As New DataTable()
            dTable.Columns.Add("ID", GetType(Integer))
            dTable.Columns.Add("ChildID", GetType(Integer))
            dTable.Columns.Add("check", GetType(Boolean))
            dTable.Columns.Add("data", GetType(String))

            For i As Integer = 0 To 9
                mTable.Rows.Add(New Object() {i, False, "Row " & i.ToString()})
            Next i

            For i As Integer = 0 To 99
                dTable.Rows.Add(New Object() {i, i \10, False, "Row " & i.ToString()})
            Next i

            Dim ds As New DataSet()
            ds.Tables.Add(mTable)
            ds.Tables.Add(dTable)
            ds.Relations.Add(New DataRelation("myRelation", mTable.Columns("ID"), dTable.Columns("ChildID"), True))
            gridControl1.DataSource = ds.Tables(0)
        End Sub

        Private Sub gridView1_ShownEditor(ByVal sender As Object, ByVal e As System.EventArgs) Handles gridView1.ShownEditor
            If TypeOf (TryCast(sender, GridView)).ActiveEditor Is CheckEdit Then
                Dim edit As CheckEdit = TryCast((TryCast(sender, GridView)).ActiveEditor, CheckEdit)
                AddHandler edit.CheckedChanged, AddressOf myEdit_CheckedChanged
            End If
        End Sub

        Private Sub myEdit_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs)
            UpdateDetailView(gridView1.FocusedRowHandle, (TryCast(sender, CheckEdit)).Checked)
        End Sub

        Private Sub UpdateDetailView(ByVal rowHandle As Integer, ByVal state As Boolean)
            Dim dView As GridView = TryCast(gridView1.GetDetailView(rowHandle, 0), GridView)
            Dim aCollapsed As Boolean = dView Is Nothing
            If dView Is Nothing Then
                gridView1.ExpandMasterRow(rowHandle)
                dView = TryCast(gridView1.GetDetailView(rowHandle, 0), GridView)
            End If
            If dView IsNot Nothing Then
                For i As Integer = 0 To dView.DataRowCount - 1
                    dView.SetRowCellValue(i, dView.Columns("check"), state)
                Next i
            End If
        End Sub
    End Class
End Namespace