wxLayoutConstraints *b4 = new wxLayoutConstraints;
m_ContentsBox = new wxTreeCtrl(dummy, wxID_HTML_TREECTRL,
wxDefaultPosition, wxDefaultSize,
- wxTR_HAS_BUTTONS | wxSUNKEN_BORDER);
+#ifdef __WXMAC__
+ wxSUNKEN_BORDER|wxTR_MAC_BUTTONS|wxTR_NO_LINES|wxTR_ROW_LINES );
+#else
+ wxSUNKEN_BORDER|wxTR_HAS_BUTTONS );
+#endif
m_ContentsBox->AssignImageList(ContentsImageList);
b4->top.Below (m_Bookmarks, 10);