-#ifndef __DDEH_BASE__
-#define __DDEH_BASE__
-
-#if defined(__WXMSW__)
-#include "wx/msw/dde.h"
-#elif defined(__WXMOTIF__)
-#include "wx/xt/dde.h"
-#elif defined(__WXGTK__)
-#include "wx/gtk/dde.h"
-#elif defined(__WXQT__)
-#include "wx/qt/dde.h"
+/////////////////////////////////////////////////////////////////////////////
+// Name: wx/dde.h
+// Purpose: DDE base header
+// Author: Julian Smart
+// Modified by:
+// Created:
+// Copyright: (c) Julian Smart
+// Licence: wxWindows Licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_DDE_H_BASE_
+#define _WX_DDE_H_BASE_
+
+#include "wx/list.h"
+
+class WXDLLIMPEXP_FWD_BASE wxDDEClient;
+class WXDLLIMPEXP_FWD_BASE wxDDEServer;
+class WXDLLIMPEXP_FWD_BASE wxDDEConnection;
+
+WX_DECLARE_USER_EXPORTED_LIST(wxDDEClient, wxDDEClientList, WXDLLIMPEXP_BASE);
+WX_DECLARE_USER_EXPORTED_LIST(wxDDEServer, wxDDEServerList, WXDLLIMPEXP_BASE);
+WX_DECLARE_USER_EXPORTED_LIST(wxDDEConnection, wxDDEConnectionList, WXDLLIMPEXP_BASE);
+
+#if defined(__WINDOWS__)
+ #include "wx/msw/dde.h"
+#else
+ #error DDE is only supported under Windows
#endif
#endif
- // __DDEH_BASE__
+ // _WX_DDE_H_BASE_