+// make the default control appearance look more native-like depending on the
+// platform
+#if defined(__WXGTK20__)
+ #define wxTR_DEFAULT_STYLE (wxTR_HAS_BUTTONS | wxTR_NO_LINES)
+#elif defined(__WXMAC__)
+ #define wxTR_DEFAULT_STYLE \
+ (wxTR_HAS_BUTTONS | wxTR_NO_LINES | wxTR_FULL_ROW_HIGHLIGHT)