The tree control style used by Explorer uses rotating triangles instead of the standard "+/-" buttons and so seems to correspond relatively well to this style. And this provides a possibility to have a more standard-looking tree controls in wxWidgets programs. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66850 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775