First create solution

Nuvolar.Module/Controllers/LongOperationController.vb

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+Imports System
+Imports System.ComponentModel
+Imports System.Collections.Generic
+Imports System.Diagnostics
+Imports System.Text
+
+Imports DevExpress.ExpressApp
+Imports DevExpress.ExpressApp.Actions
+Imports DevExpress.Persistent.Base
+Imports DevExpress.ExpressApp.Demos
+Public Class LongOperationController
+    Inherits DevExpress.ExpressApp.ViewController
+    Private progressControl As IProgressControl
+    Private waitLongOperationCompleted As AsyncOperation
+    Public Sub New()
+        MyBase.New()
+
+        'This call is required by the Component Designer.
+        InitializeComponent()
+        RegisterActions(components)
+
+    End Sub
+    MustOverride Sub DoWorkCore(longOperation As LongOperation)
+    MustOverride Function CreateProgressControl() As IProgressControl
+    Private Sub DoWork(longOperation As LongOperation)
+        Try
+            DoWorkCore(longOperation)
+        Catch ex As Exception
+            longOperation.TerminateAsync()
+        End Try
+    End Sub
+    Private Sub WorkCompleted(state As Object)
+        OnOperationCompleted()
+    End Sub
+    Private Sub LongOperation_CancellingTimeoutExpired(sender As Object, e As EventArgs)
+        TryCast(sender, LongOperation).TerminateAsync()
+    End Sub
+    Private Sub LongOperation_Completed(sender As Object, e As LongOperationCompletedEventArgs)
+        progressControl.Dispose()
+        progressControl = Nothing
+        AddHandler TryCast(sender, LongOperation).CancellingTimeoutExpired, AddressOf LongOperation_CancellingTimeoutExpired
+        AddHandler TryCast(sender, LongOperation).Completed, AddressOf LongOperation_Completed
+        waitLongOperationCompleted.PostOperationCompleted(AddressOf WorkCompleted, Nothing)
+        waitLongOperationCompleted = Nothing
+    End Sub
+    Protected Sub OnOperationStarted()
+        RaiseEvent OperationStarted(Me, Nothing)
+    End Sub
+    Protected Sub OnOperationCompleted()
+        View.ObjectSpace.Refresh()
+        RaiseEvent OperationCompleted(Me, Nothing)
+    End Sub
+    Protected Sub StartLongOperation()
+        waitLongOperationCompleted = AsyncOperationManager.CreateOperation(Nothing)
+        Dim _longOperation As LongOperation = New LongOperation(AddressOf DoWork)
+        _longOperation.CancellingTimeoutMilliSeconds = 10000
+        AddHandler _longOperation.CancellingTimeoutExpired, AddressOf LongOperation_CancellingTimeoutExpired
+        AddHandler _longOperation.Completed, AddressOf LongOperation_Completed
+
+        progressControl = CreateProgressControl()
+        progressControl.ShowProgress(_longOperation)
+        _longOperation.StartAsync()
+        OnOperationStarted()
+    End Sub
+    Public Event OperationCompleted As EventHandler
+    Public Event OperationStarted As EventHandler
+End Class
+Public Class LongOperationTerminateException
+    Inherits Exception
+End Class
+<AttributeUsage(AttributeTargets.Class, AllowMultiple:=False, Inherited:=True)> _
+Public Class BatchCreationOptionsAttribute
+    Inherits Attribute
+    Private _objectsCount As Long
+    Private _commitInterval As Long
+    Sub New()
+        MyBase.New()
+    End Sub
+    Public Sub BatchCreationOptionsAttribute(objectsCount As Long)
+        _objectsCount = objectsCount
+    End Sub
+    Public Sub BatchCreationOptionsAttribute(objectsCount As Long, commitInterval As Integer)
+        _objectsCount = objectsCount
+        _commitInterval = commitInterval
+    End Sub
+    ReadOnly Property ObjectsCount As Long
+        Get
+            Return _objectsCount
+        End Get
+    End Property
+    ReadOnly Property CommitInterval As Long
+        Get
+            Return _commitInterval
+        End Get
+    End Property
+End Class
+Public Interface IObjectPropertiesInitializer
+    Sub InitializeObject(index As Integer)
+End Interface
+Public Interface IProgressControl
+    Inherits IDisposable
+    Sub ShowProgress(longOperation As LongOperation)
+End Interface