Implementing an InputBox on NET CF

Question

I'm developing an app for Windows Mobile. It contains one main Form and user UI is implemented with individual UserControls. When the user clicks on Menu > Ship Product, the ShipProduct UserControl is added to the main forms Controls array and is shown. Once a user is on the ShipProduct UC, I would like to provide them with InputBox functionality. Here is what I have tried (pseudo). Except the delegate that adds the InputBox to the main form never returns. I am assuming that is because are.WaitOne() is on the same thread as the UI.

What do I need to do to be able to implement this?

I have found a work around using the YieldAwait library (http://yieldawait.codeplex.com), but it is turning out to be a very complicated solution.

<pre>
Main()
{
   MainForm form = new MainForm();
   Application.Run(form);
}

MainForm: Form
{
   public AutoResetEvent are = new AutoResetEvent(false);

   Menu_click()
   {
      this.Controls.Add(new ShipProduct)
   }
}

InputBox: UserControl
{
    OK_Button_click()
    {
       form.are.Set();

    }

}

ShipProduct: UserControl
{


  void GetUserInput()
  {


     Thread t = new Thread(ShowInputBox);
     t.Start();
     form.are.WaitOne();

  }

  void ShowInputBox()
  {
     InputBox ib = new InputBox();
     form.Invoke
     (
       delegate {
                  form.Controls.Add(ib);
                  ib.Show();
                } 
       /***/
       // delegate never returns!
     )
  }

}
</pre>