Handling C# events in ABAP

Question

Hi,
    I am having a very bad time trying to make a C# custom control and an ABAP class talk to each other...
    The control have many properties and methods, all of them perfectly accessible using a proxy class derived from cl_gui_control in ABAP. I can instantiate, show the control in   the screen, call its methods, get its properties, but there is nothing in the earth that makes the ABAP understand a single event raised by the component.
    In fact, the component runs ok - I tested it outside SAP, using IExplorer, and the event was good. But when I embed it on SAP, nothing happens.
    What I did:
    1) The component has an event declared this way:
// C# code, simplified
public interface IEventInfterface
   [DispID(10)]
   event Selected();
[ComSourceInterfaces(typeof(ISapControlEvents))]
public class mycontrol
   public delegate void SelectedHND();
   public event SelectedHND Selected;
   public void OnSelected()
      if (Selected != null)  // Attention here!
         Selected();
   This means that my component have a "Selected" event, its DispatchID is "10".
  2) In SAP, after making all the necessary implementations to use a class (constructor, dispatch, etc), my ABAP code contains this (consider obj_csharp an already instantiated and functional object):
DATA: evt_table    TYPE cntl_simple_events,
           evt_line       TYPE cntl_simple_event.
      evt_line-eventid = 10.   " This is my DispID to the Selected event
      evt_line-appl_event = 'X'.
      APPEND evt_line to evt_table.
      call METHOD obj_csharp->set_registered_events
        EXPORTING
          events = evt_table.
    Now, the problem is: everything works perfect, including the registration routine (the event is registrered in the obj_csharp object), but when it need to be fired, <b>VisualStudio says that the object "Selected" is null</b> in that verification (where I wrote "Attention here", remember?) and do not raise the event.
    Am I missing anything?
   Thanks !!!
Arnaldo.

Answer 1

The ap Object is declared inside my OpenWord - Method.
The class itself is bound to a GUI button as a command.
public class OfficeCommand : ICommand
    public void Execute(object parameter)
          OpenWord(info, ReadWrite);
    private void OpenWord(DocumentInfo info, bool readwrite)
            Word.Application ap = new Word.Application();
            Microsoft.Office.Interop.Word.Document document
                         = ap.Documents.Open(path,
ConfirmConversions:false,
ReadOnly:!readwrite,
                AddToRecentFiles:false);
            WordDocumentEventHandler WordCloseEventHandler = GlobalModel.createNew(info);
            ap.DocumentBeforeSave += WordCloseEventHandler.DocumentBeforeSaveEvent;
            ap.Visible = true;
            ap.Activate();