diff -r dee5afe5301f -r 3f74d0d4af4c doc/src/snippets/code/src_qdbus_qdbusargument.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc/src/snippets/code/src_qdbus_qdbusargument.cpp	Thu Apr 08 14:19:33 2010 +0300
@@ -0,0 +1,192 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [0]
+struct MyStructure
+{
+    int count;
+    QString name;
+};
+Q_DECLARE_METATYPE(MyStructure)
+
+// Marshall the MyStructure data into a D-Bus argument
+QDBusArgument &operator<<(QDBusArgument &argument, const MyStructure &mystruct)
+{
+    argument.beginStructure();
+    argument << mystruct.count << mystruct.name;
+    argument.endStructure();
+    return argument;
+}
+
+// Retrieve the MyStructure data from the D-Bus argument
+const QDBusArgument &operator>>(const QDBusArgument &argument, MyStructure &mystruct)
+{
+    argument.beginStructure();
+    argument >> mystruct.count >> mystruct.name;
+    argument.endStructure();
+    return argument;
+}
+//! [0]
+
+
+//! [1]
+qDBusRegisterMetaType<MyStructure>();
+//! [1]
+
+
+//! [2]
+MyType item = qdbus_cast<Type>(argument);
+//! [2]
+
+
+//! [3]
+MyType item;
+argument >> item;
+//! [3]
+
+
+//! [4]
+QDBusArgument &operator<<(QDBusArgument &argument, const MyStructure &mystruct)
+{
+    argument.beginStructure();
+    argument << mystruct.member1 << mystruct.member2 << ... ;
+    argument.endStructure();
+    return argument;
+}
+//! [4]
+
+
+//! [5]
+QDBusArgument &operator<<(QDBusArgument &argument, const MyStructure &mystruct)
+{
+    argument.beginStructure();
+    argument << mystruct.member1 << mystruct.member2;
+
+    argument.beginStructure();
+    argument << mystruct.member3.subMember1 << mystruct.member3.subMember2;
+    argument.endStructure();
+
+    argument << mystruct.member4;
+    argument.endStructure();
+    return argument;
+}
+//! [5]
+
+
+//! [6]
+// append an array of MyElement types
+QDBusArgument &operator<<(QDBusArgument &argument, const MyArray &myarray)
+{
+    argument.beginArray( qMetaTypeId<MyElement>() );
+    for ( int i = 0; i < myarray.length; ++i )
+        argument << myarray.elements[i];
+    argument.endArray();
+    return argument;
+}
+//! [6]
+
+
+//! [7]
+// append a dictionary that associates ints to MyValue types
+QDBusArgument &operator<<(QDBusArgument &argument, const MyDictionary &mydict)
+{
+    argument.beginMap( QVariant::Int, qMetaTypeId<MyValue>() );
+    for ( int i = 0; i < mydict.length; ++i ) {
+        argument.beginMapEntry();
+        argument << mydict.data[i].key << mydict.data[i].value;
+        argument.endMapEntry();
+    }
+    argument.endMap();
+    return argument;
+}
+//! [7]
+
+
+//! [8]
+const QDBusArgument &operator>>(const QDBusArgument &argument, MyStructure &mystruct)
+{
+    argument.beginStructure()
+    argument >> mystruct.member1 >> mystruct.member2 >> mystruct.member3 >> ...;
+    argument.endStructure();
+    return argument;
+}
+//! [8]
+
+
+//! [9]
+// extract a MyArray array of MyElement elements
+const QDBusArgument &operator>>(const QDBusArgument &argument, MyArray &myarray)
+{
+    argument.beginArray();
+    myarray.clear();
+
+    while ( !argument.atEnd() ) {
+        MyElement element;
+        argument >> element;
+        myarray.append( element );
+    }
+
+    argument.endArray();
+    return argument;
+}
+//! [9]
+
+
+//! [10]
+// extract a MyDictionary map that associates ints to MyValue elements
+const QDBusArgument &operator>>(const QDBusArgument &argument, MyDictionary &mydict)
+{
+    argument.beginMap();
+    mydict.clear();
+
+    while ( !argMap.atEnd() ) {
+        int key;
+        MyValue value;
+        argument.beginMapEntry();
+        argument >> key >> value;
+        argument.endMapEntry();
+        mydict.append( key, value );
+    }
+
+    argument.endMap();
+    return argument;
+}
+//! [10]