if (style & wxTR_HAS_BUTTONS) style |= wxTR_MAC_BUTTONS;
if (style & wxTR_HAS_BUTTONS) style &= ~wxTR_HAS_BUTTONS;
style &= ~wxTR_LINES_AT_ROOT;
if (style & wxTR_HAS_BUTTONS) style |= wxTR_MAC_BUTTONS;
if (style & wxTR_HAS_BUTTONS) style &= ~wxTR_HAS_BUTTONS;
style &= ~wxTR_LINES_AT_ROOT;