WPF Draggable Label

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace DraggableLabelTest
{
    /// <summary>
    /// Interaction logic for PrintPreview.xaml
    /// </summary>
    public partial class PrintPreview : Window
    {
        public PrintPreview()
        {
            InitializeComponent();
        }

        public IDocumentPaginatorSource Document 
        { 
            get { return documentViewer.Document; }
            set { documentViewer.Document = value; } 
        }

    }
}