wpf如何取得DataTemplate中嵌入的winform的控件名称?

如何取得picBox这一名称?

 <DataTemplate x:Key="cardViewDataTemplate">

 <Border HorizontalAlignment="Left" Grid.Row="0" Grid.Column="0" Grid.RowSpan="2" Width="80"
                            Margin="9" Height="80" VerticalAlignment="Top">

     <WindowsFormsHost Height="Auto"  Width="Auto" HorizontalAlignment="Left" Margin="20,112,0,0"  x:Name="windowsFormsHost1" VerticalAlignment="Top" >
                            <WinFormControls:PictureBox Text="WinformButton" x:Name="picBox"  />
                        </WindowsFormsHost>
                    </Border  >

  </DataTemplate>