[MFC] TreeCtrl 전체 노드 확장하기

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// 전체 Tree 확장 std::function< void (HTREEITEM) > ldExpand = [&](HTREEITEM hItem) {     if ( m_treeLibrary.ItemHasChildren(hItem) )     {         m_treeLibrary.Expand( hItem, TVE_EXPAND );         HTREEITEM hChild = m_treeLibrary.GetChildItem(hItem);         if ( hItem != nullptr ) ldExpand(hChild);     }       hItem = m_treeLibrary.GetNextSiblingItem(hItem);     if ( hItem != nullptr ) ldExpand(hItem); };   HTREEITEM hRootItem = m_treeLibrary.GetRootItem(); ldExpand(hRootItem);