Change selected and unfocused Listbox style to not be grayed out

Question

I have a really simple WPF ListBox with SelectionMode set to Multiple.

When the ListBox loses

Answer 1

This is not an answer to the question, but I found this when I was looking for a way to disable selections in my listboxes. By using a slightly modified form of Guy's & bendewey's technique above, it turns out you can give the appearance of no selections in your listbox without replacing the underlying items control or anything like that. Here's the code I used:

I also found the following MSDN page helpful:

MSDN: SystemColors Members (System.Windows)

Thanks for the help, guys.