VSTO: How to add a button to a custom task pane

Can someone help me with the code for programmatically adding a GroupBox and Buttons to a custom task pane in MS Project 2010?  

I am  creating a MS Project 2010 VSTO Addin and have already created a custom task pane.  I just can't seem to figure out how to add a GroupBox or buttons to it?  Below is the code I have so far.

Public Class ThisAddIn
    Private myFieldNavControl As System.Windows.Forms.UserControl
    Private myFieldNavTaskPane As Microsoft.Office.Tools.CustomTaskPane
    Public Shared myFieldNavTaskPaneCollection As Microsoft.Office.Tools.CustomTaskPaneCollection
    Private Sub ThisAddIn_Startup() Handles Me.Startup
        myFieldNavControl = New System.Windows.Forms.UserControl
        myFieldNavTaskPaneCollection = Globals.Factory.CreateCustomTaskPaneCollection _
            (Nothing, Nothing, "CustomTaskPanes", "CustomTaskPanes", Me)
        myFieldNavTaskPane = myFieldNavTaskPaneCollection.Add(myFieldNavControl, "Field Nav")
        With myFieldNavTaskPane
            .DockPosition = Microsoft.Office.Core.MsoCTPDockPosition.msoCTPDockPositionLeft
            .Width = 105
            .Visible = False
        End With
    End Sub
    Private Sub ThisAddIn_Shutdown() Handles Me.Shutdown
        myFieldNavTaskPaneCollection.Dispose()
    End Sub
End Class

I keep thinking the code should look like this, but of course it doesn't work.

myFieldNavTaskPaneCollection.Item(0).Controls.Add(...)

Wellyn