How to add Icons to Treeview in WPF?

Question

I would like to add some icons to my treeview. Is there a way to do it within the XAML?

    <TreeView Height="200" Name="treeView1" Width="120">
        <TreeViewItem Header="Topic1" IsExpanded="True">
            <TreeViewItem Header="Subtopic2" />
            <TreeViewItem Header="Subtopic3" />
        </TreeViewItem>
    </TreeView>

Answer 1

Ok, my fault. Found same question here after posting by similar tags.