WPF SystemColors: color of TextBox border

Question

I am trying to make a search TextBox with an embedded magnifying glass icon. I have the following markup so far:

Answer 1

To anyone that is looking for a list of Brushes and what their colors will look like with different themes/OS

I would look here: http://blogs.msdn.com/b/wpf/archive/2010/11/30/systemcolors-reference.aspx