i dont like this solution for some reasons. you are sure that not
posible
to put the label directly on the form? not at run time nor at design
time?

heare same code that i try, but is not work at all:
==============================
Imports System.Windows.Forms

Public Class Atext
   Inherits TextBox

   Public l As Label

   <System.Diagnostics.DebuggerNonUserCode()> _
   Public Sub New(ByVal Container As System.ComponentModel.IContainer)
       MyClass.New()

       'Required for Windows.Forms Class Composition Designer support
       Container.Add(Me)
       Container.Add(l)
   End Sub

   <System.Diagnostics.DebuggerNonUserCode()> _
   Public Sub New()
       MyBase.New()

       l = New Label
       l.Width = 600
       l.Height = 50
       l.Text = "llllllll"
       l.Visible = True
       l.Location = New Point(0, 0)

       'This call is required by the Component Designer.
       InitializeComponent()

   End Sub

   'Component overrides dispose to clean up the component list.
   <System.Diagnostics.DebuggerNonUserCode()> _
   Protected Overrides Sub Dispose(ByVal disposing As Boolean)
       If disposing AndAlso components IsNot Nothing Then
           components.Dispose()
       End If
       MyBase.Dispose(disposing)
   End Sub

   'Required by the Component Designer
   Private components As System.ComponentModel.IContainer

   'NOTE: The following procedure is required by the Component
Designer
   'It can be modified using the Component Designer.
   'Do not modify it using the code editor.
   <System.Diagnostics.DebuggerStepThrough()> _
   Private Sub InitializeComponent()
       components = New System.ComponentModel.Container()
   End Sub
End Class