c++ 利用msxml2.dll请求WebService

#pragma once
#include "stdafx.h"
#include "Atlbase.h"
//#import "msxml.dll"
#import "msxml2.dll"

using namespace MSXML2;
int main(int argc, char* argv[])
{
    printf("Test of XMLHTTP by masterz!\n");
    CoInitialize(NULL);
    try
    {
        IXMLHTTPRequestPtr xmlrequest;//定义http请求对象
        //xmlrequest.CreateInstance("Msxml2.XMLHTTP");
        xmlrequest.CreateInstance(__uuidof(XMLHTTP));//创建实列
        CComVariant vFalse(FALSE);
        CComVariant vNull(NULL);
        xmlrequest->open("POST",bstr_t("http://localhost:1135/Service1.asmx/GetName"),vFalse,vNull,vNull);//打开WEBServeice方法GetName
        xmlrequest->setRequestHeader("Content-Type:","application/x-www-form-urlencoded");//设置Http头
        _bstr_t bsdata("name=xiaowy&password=kkkk");//use your login name　传入请求参数
        xmlrequest->send(_variant_t(bsdata));//发道数据
        BSTR bstrbody;
        xmlrequest->get_responseText(&bstrbody);//得到返回数据
        _bstr_t bstrtbody(bstrbody);
        printf("%s\n",(LPCTSTR)bstrtbody);
        //MessageBox(0,(LPCTSTR)bstrtbody,"",MB_OK);
        MSXML2::IXMLDOMDocument2Ptr m_xmldoc;
        m_xmldoc.CreateInstance(__uuidof(MSXML2::DOMDocument));
        m_xmldoc->loadXML(bstrbody);
        /**//*MSXML2::IXMLDOMNodeListPtr nodesPtr;
        nodesPtr = m_xmldoc->selectNodes(_bstr_t("string"));
        LONG * length;
        HRESULT r =  nodesPtr->get_length(length);*/
        //MSXML2::IXMLDOMNodePtr nodePtr =
        //BSTR * str;
        //HRESULT result = nodePtr->get_text(str);
        MSXML2::IXMLDOMNodePtr node = m_xmldoc->documentElement->firstChild;
        LPCTSTR str = (LPCTSTR)node->nodeName;
        LPCTSTR str2=(LPCTSTR)m_xmldoc->documentElement->text;
        printf("%s",str2);
        getchar();
    }
    catch (_com_error &e)
    {
        printf("Description = '%s'\n", (char*) e.Description());
    }
    CoUninitialize();
    printf("program end\n");
    return 0;
}