How to disable the property dialog of the AnnTextObject when using AnnAutomationManager

I am adding a Text object to the automation annotation toolbar by creating an AnnTextObject to the AnnAutomationManager.AnnAutomationObject. When trying to draw a text object in the rasterimageviewer, the properties dialog of the text object display. How can i disable this dialog window (i.e. when adding a text object, i don't want this property dialog to be displayed).

I am using LeadTools version 14.5

Thanks.

I am trying to disable the context menu when using TextObject as follow:

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Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
        ' Type the path of the Leadtools Bin folder.
        RasterCodecs.CodecsPath = "C:\Program Files\LEAD Technologies, Inc\LEADTOOLS EVAL 14.5\Bin\Dotnet\v11"

        ' intitialize a new RasterCodecs object
        Dim codecs As RasterCodecs = New RasterCodecs

        ' load the main image into our viewer
        RasterImageViewer1.Image = codecs.Load("C:\mages\sample1.cmp")

        If (Not IsNothing(RasterImageViewer1.Image)) Then
            ' create and setup the automation manager
            annAutomationManager = New AnnAutomationManager

            ' Instruct the manager to create the default (all) automation objects.
            annAutomationManager.CreateDefaultObjects()

            ' create the toolbar and add it to the form
            annAutomationManager.CreateToolBar()
            ''annAutomationManager.ContextMenu = Nothing

            For Each obj As AnnAutomationObject In annAutomationManager.Objects
                ' for each tool
                obj.UseRotateControlPoints = True
                'obj.ContextMenu = Nothing

                If obj.Id = annAutomationManager.TextObjectId Then
                    obj.ContextMenu = Nothing
                End If
            Next obj

            Controls.Add(annAutomationManager.ToolBar)

            ' setup the automation (will create the container as well)
            Dim automation As AnnAutomation = New AnnAutomation(annAutomationManager, RasterImageViewer1)

            ' setup this automation as the active one
           automation.Active = True
        End If
    End Sub
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However, after compiling the project, when i select the textobject item from the menu and start draw the text box in the rasterimageviewer, the properties dialog of the textobject still display automatically. Is anything incorrect ?????[:'(]