How to set focus on TextBox in Silverlight 4 out-of-browser popup

Question

I have a simple ChildWindow popup in Silverlight 4 (beta).

Important: This is an out-of-browser application.

i want to auto

Answer 1

You are on the right track. You need to handle for two test cases:
1. Setting the focus in the browser. 2. Setting the focus out of the browser.

Your code you that you showed in the Loaded event will work perfectly fine out of the browser. All that is necessary is to refactor it to handle both cases:

private void ChildWindow_Loaded(object sender, RoutedEventArgs e)
{
    if (App.current.IsRunningOutOfBrowser)
    {
        textBox1.Focus();
    }
    else
    {
        System.Windows.Browser.HtmlPage.Plugin.Focus();
        textBox1.Focus();
    }
}

That should do the trick for you.