DirectX and user controls?

Hi

I want to create a user control that uses DirectX to render itself.

I just started out with DirectX and have finished a tutorial that just renders the form blue, the code is below.

//These two methods are in a form called CreateDevice
 public bool InitializeGraphics()
{
      try
      {
      // Now  setup our D3D stuff
      PresentParameters presentParams = new PresentParameters();
      presentParams.Windowed=true;
      presentParams.SwapEffect = SwapEffect.Discard;
      _device = new Device(0, DeviceType.Hardware, this, CreateFlags.SoftwareVertexProcessing, presentParams);
      return true;
        }
      catch (DirectXException)
      {
            return false;
      }
}

private void Render()
{
      if (_device == null)
            return;

      //Clear the backbuffer to a blue color
      _device.Clear(ClearFlags.Target, System.Drawing.Color.Blue, 1.0f, 0);
      //Begin the scene
      _device.BeginScene();
   
      // Rendering of scene objects can happen here
      //End the scene
      _device.EndScene();
      _device.Present();
}

The last part is the bit that has me confused, which is to create the rendering loop and happens in the Main method

static void Main()
{

    using (CreateDevice frm = new CreateDevice())
    {
        if (!frm.InitializeGraphics()) // Initialize Direct3D
        {
            MessageBox.Show(         "Could not initialize Direct3D.  This tutorial will exit.");
            return;
        }
        frm.Show();

        // While the form is still valid, render and process messages
        while(frm.Created)
        {
            frm.Render();
            Application.DoEvents();
        }
    }
}

Thats easy but how do I create a usercontrol that can render itself using directX.

The application I'm planning to make will have one window that uses directx and the others will be standard windows forms (i.e. an MDI app). Ideally I would like to make a user control that renders itself using directX. Upon failing that I would like one of the MDI children to render itself using directX (preferrably in a thread of their own).

Any suggestions/ideas on how to go about doing this?