You receive a System.Threading.ThreadStateException exception when you try to create an instance of a Windows form

Steps to reproduce the problem

1. Start Microsoft Visual Studio .NET or Microsoft Visual Studio 2005.
2. Use Microsoft Visual Basic .NET or Microsoft Visual Basic 2005 to create a Windows Application project.
   
   By default, the Form1 Windows form is created.
3. Add any ActiveX control, such as the Microsoft Web Browser control, to the Form1 Windows form.
4. If you want to specify that the main thread in the host application runs in an MTA, follow these steps:
   
   1. In the Form1.vb file, locate the following code:

      End Class

   2. Add the following code before the code that you located in the previous step:

      <MTAThread()> _
      Public Shared Sub Main()
         ' Run a standard application message loop on the current thread.
         Application.Run(New Form1())
      End Sub

   If you want to start a new thread without specifying the apartment state of the thread, follow these steps:
   
   1. In the Form1.vb file, locate the following code:

      End Class

   2. Add the following code before the code that you located in the previous step:

      Public Shared Sub Main()
         ' Create a thread. Then run the LaunchForm method on the thread.
         ' This automatically runs the main thread in the application in an MTA.
         Dim MyThread As System.Threading.Thread
         MyThread = New System.Threading.Thread(AddressOf LaunchForm)
         MyThread.Start()
      End Sub
      
      Public Shared Sub LaunchForm()
         ' Run a standard application message loop on the current thread.
         Application.Run(New Form1())
      End Sub

   If you want to specify the apartment state of a new thread as multithreaded before the thread is started, follow these steps:
   
   1. In the Form1.vb file, locate the following code:

      End Class

   2. Add the following code before the code that you located in the previous step:

      Public Shared Sub Main()
         ' Create a thread. Then run the LaunchForm method on the thread.
         Dim MyThread As System.Threading.Thread
         MyThread = New System.Threading.Thread(AddressOf LaunchForm)
         ' Specify that the MyThread thread runs in an MTA.
         MyThread.ApartmentState = Threading.ApartmentState.MTA
         MyThread.Start()
      End Sub
      
      Public Shared Sub LaunchForm()
         ' Run a standard application message loop on the current thread.
         Application.Run(New Form1())
      End Sub

5. Build your host application, and then run your host application.
   
   The problem that is mentioned in the "Symptoms" section may occur.