MFC之树控件

树控件对应的类：

CTreeControl

树控件属性设置：

启用复选框：Check Boxes = True

父节点显示+-按钮：Has Button = True ; Lines At Roots = True(若不想根节点显示+-按钮可以不设置)

显示项的层次结构线：Has Lines = True;

添加树节点：

     HTREEITEM hRootNode = m_tvwTree.InsertItem(_T("人"));
     HTREEITEM hNode = m_tvwTree.InsertItem(_T("老人"), hRootNode, TVI_LAST);
     HTREEITEM hChildNode = m_tvwTree.InsertItem(_T("男人"), hNode, TVI_LAST);

NM_CLICK消息处理函数：

 void CTestTreecontrolDlg::OnNMClickTree1(NMHDR *pNMHDR, LRESULT *pResult)
 {
     CPoint PT;
     ::GetCursorPos(&PT);
     ::ScreenToClient(pNMHDR->hwndFrom, &PT);

     UINT uFlags;
     HTREEITEM hSelectedItem = m_tvwTree.HitTest(PT, &uFlags);
     if(NULL == hSelectedItem)
     {
         return;
     }

     if(uFlags & TVHT_ONITEM)
     {
         CString str = m_tvwTree.GetItemText(hSelectedItem);
         AfxMessageBox(str);
     }

     *pResult = ;
 }

TVN_SELCHANGED消息处理函数：

 void CTestTreecontrolDlg::OnTvnSelchangedTree1(NMHDR *pNMHDR, LRESULT *pResult)
 {
     LPNMTREEVIEW pNMTreeView = reinterpret_cast<LPNMTREEVIEW>(pNMHDR);

     HTREEITEM hSelectedItem = m_tvwTree.GetSelectedItem();
     if(NULL == hSelectedItem)
     {
         return;
     }

     CString str = m_tvwTree.GetItemText(hSelectedItem);
     if(str.IsEmpty())
     {
         return;
     }

     AfxMessageBox(str);

     *pResult = ;
 }