Thank you for the hint, since I am using the whole draganddrop
infrastructure, this would
lead to a difficile design. At this time, I am using a workaround via
reflection:

Type t = de.Data.GetType();
  if (t.Name == "BehaviorDataObject")
  {
   PropertyInfo pi = t.GetProperty("DragComponents");
   ArrayList comps = pi.GetValue(de.Data, null) as ArrayList;
   if (comps != null && comps.Count > 0)
   {
    object o = comps[0];                                                //
here I get my dragged OutputControl
    if (o.GetType() == typeof(OutputControl))         {     // lets see if
is really an OutputControl

This returns the DragComponents property from DropSourceBehavior which in
turn holds
the dragged control in its ArrayList.

However, I would like Microsoft to notice that there is a problem with
keeping DropSourceBehavior internal.
Or maybe I missed something. Also to MS: VS 2005 is superdupergreat! i love
it!

thanks jokiz