Within an event, I'd like to put the focus on a specific TextBox within the ListViewItem's template. The XAML looks like this:

<ListView x:Name="myList" ItemsSource="{Binding SomeList}">
    <ListView.View>
        <GridView>
            <GridViewColumn>
                <GridViewColumn.CellTemplate>
                    <DataTemplate>
                        <!-- Focus this! -->
                        <TextBox x:Name="myBox"/>

I've tried the following in the code behind:

(myList.FindName("myBox") as TextBox).Focus();

but I seem to have misunderstood the FindName() docs, because it returns null.

Also the ListView.Items doesn't help, because that (of course) contains my bound business objects and no ListViewItems.

Neither does myList.ItemContainerGenerator.ContainerFromItem(item), which also returns null.