title: WPF changing button background color when the window is disabled
body: <p>I have a button with a transparent background on a wpf window.</p>
  
  <p>Problem is, when I open up another window with a .showdialog the form becomes disabled as does the button, causing the button to go white (and stick out like a sore thumb); the same happens to the listview and textbox controls.  Labels and group boxes aren't impacted in this way and remain looking fine.</p>
  
  <p>How do I preserve the transparency color of the button, listview and textboxes when they are disabled?</p>
  
  <p>Thanks, Rob</p>