attr.colFg = wxSystemSettings::GetColour( wxSYS_COLOUR_WINDOWTEXT );
attr.colBg = wxSystemSettings::GetColour( wxSYS_COLOUR_LISTBOX );
attr.colFg = wxSystemSettings::GetColour( wxSYS_COLOUR_WINDOWTEXT );
attr.colBg = wxSystemSettings::GetColour( wxSYS_COLOUR_LISTBOX );