CTreeCtrl* p_Tree = (CTreeCtrl*)GetDlgItem(IDC_TREE1);
TVINSERTSTRUCT insertStut;
insertStut.hInsertAfter = NULL;
insertStut.hParent = NULL;
insertStut.item.pszText = _T("中国");
insertStut.item.mask = TVIF_TEXT;
HTREEITEM hCountry = p_Tree->InsertItem(&insertStut);
HTREEITEM hProvince = p_Tree->InsertItem(TVIF_TEXT,"河南省",0,0,0,0,0,hCountry,NULL);
HTREEITEM hProvince1 = p_Tree->InsertItem(TVIF_TEXT,"河南省1",0,0,0,0,0,hCountry,NULL);
HTREEITEM hProvince2 = p_Tree->InsertItem(TVIF_TEXT,"河南省2",0,0,0,0,0,hCountry,hProvince);
p_Tree->InsertItem(_T("Pittsburgh"), hProvince, TVI_SORT);
p_Tree->InsertItem(_T("Harrisburg"), hProvince, TVI_SORT);
p_Tree->InsertItem(_T("Altoona"), hProvince, TVI_SORT);
insertStut.item.pszText = "俄罗斯";
HTREEITEM hCountry1 = p_Tree->InsertItem(&insertStut);
p_Tree->Expand(hCountry,TVE_EXPAND);
