First create solution

Nuvolar.Module.Win/Controllers/TreeListVC.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.TreeListEditors.Win
+Imports DevExpress.XtraTreeList
+Imports DevExpress.Persistent.Base.General
+
+
+Public Class TreeListVC
+	Inherits DevExpress.ExpressApp.ViewController
+
+	Public Sub New()
+		MyBase.New()
+
+		'This call is required by the Component Designer.
+		InitializeComponent()
+		RegisterActions(components) 
+
+        TargetViewType = ViewType.ListView
+        TargetObjectType = GetType(ITreeNode)
+
+    End Sub
+    Protected Overrides Sub OnActivated()
+        MyBase.OnActivated()
+
+        
+
+    End Sub
+
+    Private Sub aTreeCollapseAll_Execute(ByVal sender As System.Object, ByVal e As DevExpress.ExpressApp.Actions.SimpleActionExecuteEventArgs) Handles aTreeCollapseAll.Execute
+        Dim _ListView As ListView = CType(View, ListView)
+        Dim _ListEditor As TreeListEditor = CType(_ListView.Editor, TreeListEditor)
+        Dim _TreeList As TreeList = _ListEditor.TreeList
+        _TreeList.CollapseAll()
+    End Sub
+
+    Private Sub aTreeExpandAll_Execute(ByVal sender As System.Object, ByVal e As DevExpress.ExpressApp.Actions.SimpleActionExecuteEventArgs) Handles aTreeExpandAll.Execute
+        Dim _ListView As ListView = CType(View, ListView)
+        Dim _ListEditor As TreeListEditor = CType(_ListView.Editor, TreeListEditor)
+        Dim _TreeList As TreeList = _ListEditor.TreeList
+        _TreeList.ExpandAll()
+    End Sub
+End Class