这几天小猪由于工作的原因在学习C++。为了明年工作有进展，小猪利用空余时间编写了一个树的结果，基于mfc的对话框程序。

前期创建过程小猪就不再演示了。接下阿来小猪就跟你谈谈如何用代码实现下面的tree control里面的现象。

第一步：在tree control空间里面添加成员变量m_mytree

第二步：找到BOOL CCTreeDlg::OnInitDialog()   // CCTreeDlg这个是根据你创建的名字。

         然后找到// TODO: 在此添加额外的代码。

第三步：在上一步写上如下代码。

HTREEITEM hJiaxing = m_mytree.InsertItem(_T("嘉兴市"),NULL,NULL);///root就是节点的标题,InsertItem函数的第一个参数就是设置他的节点标题

HTREEITEM hSubItem1 = m_mytree.InsertItem(_T("海盐县"),NULL,NULL,hJiaxing);

HTREEITEM hHaiyan = m_mytree.InsertItem(_T("地区1"),NULL,NULL,hSubItem1);

hHaiyan = m_mytree.InsertItem(_T("地区2"),NULL,NULL,hSubItem1);

hHaiyan = m_mytree.InsertItem(_T("地区3"),NULL,NULL,hSubItem1);

hHaiyan = m_mytree.InsertItem(_T("地区4"),NULL,NULL,hSubItem1);

hHaiyan = m_mytree.InsertItem(_T("地区5"),NULL,NULL,hSubItem1);

hHaiyan = m_mytree.InsertItem(_T("地区6"),NULL,NULL,hSubItem1);

HTREEITEM hSubItem2 = m_mytree.InsertItem(_T("嘉善县"),NULL,NULL,hJiaxing);

HTREEITEM hJiashan = m_mytree.InsertItem(_T("地区1"),NULL,NULL,hSubItem2);

hJiashan = m_mytree.InsertItem(_T("地区2"),NULL,NULL,hSubItem2);

hJiashan = m_mytree.InsertItem(_T("地区3"),NULL,NULL,hSubItem2);

hJiashan = m_mytree.InsertItem(_T("地区4"),NULL,NULL,hSubItem2);

hJiashan = m_mytree.InsertItem(_T("地区5"),NULL,NULL,hSubItem2);

hJiashan = m_mytree.InsertItem(_T("地区6"),NULL,NULL,hSubItem2);

HTREEITEM hSubItem3 = m_mytree.InsertItem(_T("海宁市"),NULL,NULL,hJiaxing);

HTREEITEM hHaining = m_mytree.InsertItem(_T("地区1"),NULL,NULL,hSubItem3);

hHaining = m_mytree.InsertItem(_T("地区2"),NULL,NULL,hSubItem3);

hHaining = m_mytree.InsertItem(_T("地区3"),NULL,NULL,hSubItem3);

hHaining = m_mytree.InsertItem(_T("地区4"),NULL,NULL,hSubItem3);

hHaining = m_mytree.InsertItem(_T("地区5"),NULL,NULL,hSubItem3);

hHaining = m_mytree.InsertItem(_T("地区6"),NULL,NULL,hSubItem3);

HTREEITEM hSubItem4 = m_mytree.InsertItem(_T("平湖市"),NULL,NULL,hJiaxing);

HTREEITEM hPinghu = m_mytree.InsertItem(_T("地区1"),NULL,NULL,hSubItem4);

hPinghu = m_mytree.InsertItem(_T("地区2"),NULL,NULL,hSubItem4);

hPinghu = m_mytree.InsertItem(_T("地区3"),NULL,NULL,hSubItem4);

hPinghu = m_mytree.InsertItem(_T("地区4"),NULL,NULL,hSubItem4);

hPinghu = m_mytree.InsertItem(_T("地区5"),NULL,NULL,hSubItem4);

hPinghu = m_mytree.InsertItem(_T("地区6"),NULL,NULL,hSubItem4);

HTREEITEM hSubItem5 = m_mytree.InsertItem(_T("桐乡市"),NULL,NULL,hJiaxing);

HTREEITEM hTongxiang = m_mytree.InsertItem(_T("地区1"),NULL,NULL,hSubItem5);

hTongxiang = m_mytree.InsertItem(_T("地区2"),NULL,NULL,hSubItem5);

hTongxiang = m_mytree.InsertItem(_T("地区3"),NULL,NULL,hSubItem5);

hTongxiang = m_mytree.InsertItem(_T("地区4"),NULL,NULL,hSubItem5);

hTongxiang = m_mytree.InsertItem(_T("地区5"),NULL,NULL,hSubItem5);

hTongxiang = m_mytree.InsertItem(_T("地区6"),NULL,NULL,hSubItem5);

HTREEITEM hSubItem6 = m_mytree.InsertItem(_T("南湖区"),NULL,NULL,hJiaxing);

HTREEITEM hNanhu = m_mytree.InsertItem(_T("地区1"),NULL,NULL,hSubItem6);

hNanhu = m_mytree.InsertItem(_T("地区2"),NULL,NULL,hSubItem6);

hNanhu = m_mytree.InsertItem(_T("地区3"),NULL,NULL,hSubItem6);

hNanhu = m_mytree.InsertItem(_T("地区4"),NULL,NULL,hSubItem6);

hNanhu = m_mytree.InsertItem(_T("地区5"),NULL,NULL,hSubItem6);

hNanhu = m_mytree.InsertItem(_T("地区6"),NULL,NULL,hSubItem6);

HTREEITEM hSubItem7 = m_mytree.InsertItem(_T("秀洲区"),NULL,NULL,hJiaxing);

HTREEITEM hXiuzhou = m_mytree.InsertItem(_T("地区1"),NULL,NULL,hSubItem7);

hXiuzhou = m_mytree.InsertItem(_T("地区2"),NULL,NULL,hSubItem7);

hXiuzhou = m_mytree.InsertItem(_T("地区3"),NULL,NULL,hSubItem7);

hXiuzhou = m_mytree.InsertItem(_T("地区4"),NULL,NULL,hSubItem7);

hXiuzhou = m_mytree.InsertItem(_T("地区5"),NULL,NULL,hSubItem7);

hXiuzhou = m_mytree.InsertItem(_T("地区6"),NULL,NULL,hSubItem7);

return TRUE;  // 除非将焦点设置到控件，否则返回TRUE