long splitterStyle = wxSP_3D;
// Drawing moving sash can cause problems on wxMac
#ifdef __WXMAC__
+ splitterStyle = 0; // 3D style looks poor on Mac
splitterStyle |= wxSP_LIVE_UPDATE;
#endif
m_Splitter = new wxSplitterWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, splitterStyle);