I want the white arrow to appear in my text input boxes so users have a way of forward other than tapping away from the keyboard or using the hardware Back button.
T
Also, I found that to get the white submit button that the search box has you can set the InputScope to "search":
I still haven't figured out if this has any unintended side-effects.
For good measure here is the code to dismiss the keyboard in the KeyUp event:
void InputBox_KeyUp(object sender, System.Windows.Input.KeyEventArgs e)
{
if (e.Key == Key.Enter)
{
this.Focus();
}
}