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HTREEITEM hRoot;
HTREEITEM hl;
HTREEITEM hr;
HTREEITEM hNew = m_tree.InsertItem("根",TVI_ROOT);
hl = m_tree.InsertItem("L1", hNew);
hr = m_tree.InsertItem("R1", hNew);
m_tree.InsertItem("K", hr);
m_tree.InsertItem("根1",TVI_ROOT);
m_tree.InsertItem("2", m_tree.InsertItem("根2",TVI_ROOT));
m_tree.Expand(hRoot, TVE_EXPAND);