Added wxWindowMSW::GetThemedBorderStyle as a helper for 2.8

Improved help window borders


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@47962 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/window.h

@@ -219,6 +219,12 @@ public:
     // created yet)
     void MSWUpdateStyle(long flagsOld, long exflagsOld);
 
+#if wxABI_VERSION >= 20805
+    // Helper for getting an appropriate theme style for the application. Unnecessary in
+    // 2.9 and above.
+	wxBorder GetThemedBorderStyle() const;
+#endif
+
     // translate wxWidgets coords into Windows ones suitable to be passed to
     // ::CreateWindow()
     //