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diff --git a/kdecore/kipc.h b/kdecore/kipc.h
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+/* This file is part of the KDE libraries
+
+   Copyright (C) 1999 Mattias Ettrich (ettrich@kde.org)
+   Copyright (C) 1999,2000 Geert Jansen <jansen@kde.org>
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+#ifndef __KIPC_h_Included__
+#define __KIPC_h_Included__
+
+#include <qwindowdefs.h>
+#include "kdelibs_export.h"
+
+/**
+ * This class implements a very simple IPC mechanism for KDE. You can send
+ * a message of a predefined type to either a specific application, or to all
+ * KDE application on the current display. The message can carry one integer of
+ * data.
+ *
+ * KIPC is mainly used in KDE for sending "Change Messages", i.e. a message to
+ * all KDE apps that a certain setting (the font, for example) has changed.
+ * For anything more complex it is recommended to use DCOP -- the Desktop
+ * Communications Protocol.
+ *
+ * Messages with id code < 32 are called "System Messages". These are
+ * directly handled by KApplication. Examples are: PaletteChanged and
+ * StyleChanged. Messages with id code >= 32 are user messages. KApplication
+ * emits the signal kipcMessage(id,arg) for each user message it receives.
+ *
+ * KIPC is implemented using X11 ClientMessage events.
+ *
+ * @see KApplication::kipcMessage()
+ * @author Geert Jansen <jansen@kde.org>
+ */
+class KDECORE_EXPORT KIPC
+{
+public:
+    /**
+     * A identifier for messages. Messages below UserMessage are system
+     * messages, messages above can be defined by the user.
+     */
+    enum Message { PaletteChanged=0, FontChanged, StyleChanged,
+                   BackgroundChanged, SettingsChanged, IconChanged, ToolbarStyleChanged,
+                   ClipboardConfigChanged, /// @since 3.1
+                   BlockShortcuts, /// @since 3.5
+                   UserMessage=32 };
+
+    /**
+     * Send a message to a specific application.
+     *
+     * @param msg The message to send.
+     * @param w The window id of a toplevel window of the target application.
+     * @param data An optional integer of data.
+     */
+    static void sendMessage(Message msg, WId w, int data=0);
+
+    /**
+     * Send a message to all KDE application on the current display.
+     *
+     * @param msg The message to send.
+     * @param data An optional integer of data.
+     */
+    static void sendMessageAll(Message msg, int data=0);
+};
+#endif