First create solution

Nuvolar.Module.Win/Editor/MemoEditor.vb

@@ -0,0 +1,16 @@
+Imports DevExpress.ExpressApp.Win.Editors
+Imports Microsoft.VisualBasic
+Imports System
+Imports DevExpress.ExpressApp.Model
+Public Class MemoEditStringPropertyEditor
+    Inherits StringPropertyEditor
+    Sub New(objectType As System.Type, model As DevExpress.ExpressApp.Model.IModelMemberViewItem)
+
+        MyBase.New(objectType, model)
+
+    End Sub
+    Protected Overrides Function CreateRepositoryItem() As DevExpress.XtraEditors.Repository.RepositoryItem
+        Return New RepositoryItemLargeStringEdit
+    End Function
+End Class
+