Only difference I see is that you used a ListBox, and I'm using a ListView.

>Hi,
>
>Snip from the solution: "Actually after calling the "SetActivePattern" the control return to the Listview changed event and it retun to ListView. So again the Focus moved to ListView."
>
>I don't see this. Here's a simple version:

<Window x:Class="WpfApplication1.Junk"
>    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
>    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
>    Title="Junk" Height="300" Width="300">
>    <StackPanel>
>        <Button Height="23" HorizontalAlignment="Left" Margin="50,30,0,0" Name="button1" VerticalAlignment="Top" Width="75">Button</Button>
>        <TextBox Height="23" Margin="40,66,88,0" Name="txtPatternName" Text="{Binding Path=PatternName, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}" VerticalAlignment="Top" />
>        <StackPanel>
>            <ListBox Height="65" Margin="59,0,120,45" Name="listBox1" VerticalAlignment="Bottom" SelectionChanged="listBox1_SelectionChanged" >
>                <ListBoxItem>One</ListBoxItem>
>                <ListBoxItem>Two</ListBoxItem>
>                <ListBoxItem>Three</ListBoxItem>
>            </ListBox>
>        </StackPanel>
>    </StackPanel>
></Window>

with

       private void listBox1_SelectionChanged(object sender, SelectionChangedEventArgs e)
>        {
>            txtPatternName.Focus();
>        }

This seems to work fine - why did your code behave differently?
>Regards,
>Viv
>
>
>
>
>>Well. problem solved...Got a working answer from the WPF forum on http://social.msdn.microsoft.com/Forums/en-US/wpf/threads/
>>
>>Here is the reply from that smart person that works perfectly. There may be other solutions, but I can say that this one did indeed work:
>>
>>

>>Hi,
>>
>>Actually after calling the "SetActivePattern" the control return to the Listview changed event and it retun to ListView. So again the Focus moved to ListView. To overcome u start the SetActivePattern function in a Dispatcher.Invoke or BeginInvoke with System Idle priority u get the focus in text pattern. See the sample below
>>
>>define a delegate
>>private delegate void focus(HolePattern NewActivePattern);
>>
>>paste the below code inside the lvHolePatterns_SelectionChanged
>>
>>this.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.SystemIdle, new focus(SetActivePattern),
>>(HolePattern)lvSender.SelectedItem);
>>
>>Hope this helps
>>Regards
>>Anandakumar.R
>>

>>
>>
>>
>>
>>
>>>Hi Matt,
>>>
>>>Have you checked the KeyboardNavigation.TabNavigation property? This property controls how navigation is handled in WPF containers.
>>>
>>>Focus can fail for any of the following reasons:-
>>>
>>>1] Element Enabled = false
>>>2] Element IsVisible = false
>>>3] Element Focusable = false
>>>
>>>Or
>>>
>>>4] Element is in a control and not the main xaml (not been loaded)
>>>5] LostKeyboardFocus and PreviewLostKeyboardFocus are preventing it
>>>
>>>Where you are trying to set the Focus in your code put a new line in that makes a call to the textbox PredictFocus method and set a breakpoint. PredictFocus will not shift the focus but it will tell you what should be focused next and help resolve containers that are not releasing the focus.
>>>
>>>HTH
>>>Neil