c# - How to show programmatically FocusVisualStyle? -

afters attemps tell focusvisualstyle activated keyboard (tab , arrows keys).

try make focusvisualstyle applied after component loaded, impossible do, there easy way around problem?

i found this:
- focus visual not showing when navigating focus programically
- how wpf buttons decide show focusvisualstyle?
- http://social.msdn.microsoft.com/forums/en-us/wpf/thread/99856840-f8ef-4547-9150-c4c46ec2f3df

but none shows definite solution (without overwriting component), , not write, can help?

i not pretty sure understand issue, tried example in 1 of links , able move focus next component code behind using keyboard. here code.

<window x:class="wpfapplication1.mainwindow"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         title="mainwindow" height="350" width="525"         xmlns:local="clr-namespace:wpfapplication1" loaded="onloaded"         >     <stackpanel margin="10">         <textbox margin="10" x:name="a" >a</textbox>         <textbox margin="10" x:name="b" >b</textbox>         <button focusable="false" click="onclick">move focus</button>     </stackpanel> </window>  public partial class mainwindow : window {     public mainwindow() {         initializecomponent();     }      private void onloaded(object sender, routedeventargs e) {         a.focus();     }      private void onclick(object sender, routedeventargs e) {         var request = new traversalrequest(focusnavigationdirection.next);         var elementwithfocus = focusmanager.getfocusedelement(focustest) uielement;         if (elementwithfocus != null)             elementwithfocus.movefocus(request);     } }