Added ability to call wxWindow::OnPaint under Windows (experimental).

Added wxTR_NO_LINES to remove lines from tree control (MSW only).


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@7925 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/dcclient.h

@@ -74,6 +74,9 @@ public:
 
     virtual ~wxPaintDC();
 
+    // find the entry for this DC in the cache (keyed by the window)
+    static WXHDC FindDCInCache(wxWindow* win);
+
 protected:
     static wxArrayDCInfo ms_cache;