public void HandleWriteAccess(DataAttribute dataAttr, WriteAccessHandler handler, object parameter)
            {
                writeAccessHandlers.Add(dataAttr.self, new WriteAccessHandlerInfo(handler, parameter, dataAttr));
                //writeAccessHandlers.Item [dataAttr.self] = handler;

                IedServer_handleWriteAccess(self, dataAttr.self, writeAccessHandler, IntPtr.Zero);
            }
 public WriteAccessHandlerInfo(WriteAccessHandler h, object p, DataAttribute da)
 {
     handler       = h;
     parameter     = p;
     dataAttribute = da;
 }