text: HTREEITEM hmyItem = m_TreeCtrl.GetSelectedItem();
  
  // Show all of the previous siblings of hmyItem in bold.
  HTREEITEM hItem = hmyItem;
  
  while (hItem != NULL)
  {
     m_TreeCtrl.SetItemState(hItem, TVIS_BOLD, TVIS_BOLD);
     hItem = m_TreeCtrl.GetPrevSiblingItem(hItem);
  }