Hi Stoitcho,

I know that I cannot parent control created in different threads. That's why
I am already invoking the main UI thread (see the EventHandler
EventProxy_Initialized). It's very strange what's going on there which I saw
after modifying the code a little:

--------- snip ---------

private void EventProxy_Initialized(object sender, EventArgs e)
{
   CreateCommunicatorControls();
}

private void CreateCommunicatorControls()
{
   System.Diagnostics.Trace.WriteLine("CreateCommunicatorControls called");

   // check for invokation
   if (this.InvokeRequired)
   {
       System.Diagnostics.Trace.WriteLine("Invoke was required");
       MethodInvoker invoker = new
MethodInvoker(this.CreateCommunicatorControls);
       this.Invoke(invoker);
   }
   else
               System.Diagnostics.Trace.WriteLine("Invoke was not
required");
   try
   {
       [...]
       // create controls and add them to a panel on the form
       this.panelCommunicator.Controls.Add(newCommCtrl);
       [...]
   }
   catch (Exception e)
   {
       System.Diagnostics.Trace.WriteLine(e.Message);
   }
}

--------- snip ---------

After executing the code the output was the following:
CreateCommunicatorControls called
Invoke was required
CreateCommunicatorControls called
Invoke was not required
Controls created on one thread cannot be parented to controls on a different
thread

I was somehow wondered and diagnosted that the panelCommunicator was running
on a different UI thread, because this.panelCommunicator.InvokeRequired
returned true. I still do not understand why because the panel gets created
in the forms constructor's InitializeComponent() method.

To answer your question Stoitcho:
I am getting a remote event via remoting. Since this event is not raised
from the UI thread I am required to create the controls from a different and
invoke the main UI thread from that one. Each event registers a control,
prior to the event I do not know how many controls I need, that's why the
controls get created dynamically.

Regards,
Michael