VSTO CommandBarButton Position

I am writing a VSTO add-in to add a standard toolbar button for all new MailItems in Outlook 2003.

I've got this mostly finished, but I can't figure out how to set the position of the button on the taskbar - ideally I would like to place it next to the submit button.

Here is the code I have.

Private Sub colInsp_NewInspector(ByVal Inspector As Microsoft.Office.Interop.Outlook.Inspector) Handles colInsp.NewInspector
    Dim msg As Outlook.MailItem
    Dim commandBar As Office.CommandBar
    Dim encryptButton As Office.CommandBarButton
    Dim olkitem As Object
    olkitem = Me.ActiveInspector().CurrentItem

    If TypeOf Inspector.CurrentItem Is Outlook.MailItem Then
        msg = CType(Inspector.CurrentItem, Outlook.MailItem)
        commandBar = Inspector.CommandBars("Standard")
        encryptButton = commandBar.FindControl(Tag:="EncryptMail")
        If Not (encryptButton Is Nothing) Then
            encryptButton.Delete()
        End If
        encryptButton = CType(commandBar.Controls.Add(1), Office.CommandBarButton)
        encryptButton.Style = Office.MsoButtonStyle.msoButtonIconAndCaption
        encryptButton.FaceId = 718
        encryptButton.Caption = "Secure Email"
        encryptButton.Tag = "EncryptMail"
        If olkitem.Sensitivity = Outlook.OlSensitivity.olConfidential Then
            encryptButton.State = Office.MsoButtonState.msoButtonDown
        End If
        AddHandler encryptButton.Click, AddressOf encryptButton_Click
        msg = Nothing
    End If
End Sub

      

        
        
        
      

    

Any help would be hugely appreciated!

Thanks Jim.