code: public static String getWindowsVisualStyle() {
          String style = UIManager.getString("win.xpstyle.name");
          if (style == null) {
              // guess the name of the current XPStyle
              // (win.xpstyle.colorName property found in awt_DesktopProperties.cpp in
              // JDK source)
              style = (String) Toolkit.getDefaultToolkit().getDesktopProperty(
                      "win.xpstyle.colorName");
          }
          return style;
      }
docs: Returns the name of the current Windows visual style.
  <ul>
  <li>it looks for a property name "win.xpstyle.name" in UIManager and if
  not found
  <li>it queries the win.xpstyle.colorName desktop property
  ({@link Toolkit#getDesktopProperty(java.lang.String)})
  </ul>
  
  @return the name of the current Windows visual style if any.