#include <string>
#include <iostream>
#import <msxml4.dll>

void SendData(std::wstring url, std::wstring username, std::wstring password)
{

    HRESULT hr;
    MSXML2::IXMLHTTPRequestPtr pIXMLHTTPRequest;
    MSXML2::IXMLDOMDocumentPtr pXMLDoc;
    std::wstring wvarQuery(L"username=");
    wvarQuery.append(username);
    wvarQuery.append(L"&password=");
    wvarQuery.append(password);
    _variant_t vartQueryFields(wvarQuery.c_str());

    try
    {
        CoInitialize(NULL);
        hr=pIXMLHTTPRequest.CreateInstance(__uuidof(MSXML2::XMLHTTP));
        SUCCEEDED(hr) ? 0 : throw hr;

        hr=pIXMLHTTPRequest->open("POST", url.c_str(), 
            false);
        SUCCEEDED(hr) ? 0 : throw hr;
        //如果要向服务器post数据，这个地方一定要设置为application/x-www-form-urlencoded
        pIXMLHTTPRequest->setRequestHeader("Content-Type", "application/x-www-form-urlencoded");

        hr = pIXMLHTTPRequest->send( vartQueryFields );
        SUCCEEDED(hr) ? 0 : throw hr;
        //拿到返回来的xml数据
        pXMLDoc=pIXMLHTTPRequest->responseXML;
        //后面就是对拿回来的xml数据进行解析，主要是dom方法
    }
    catch()
    {
        if(pIXMLHTTPRequest)
            pIXMLHTTPRequest.Release();
        if(pXMLDoc)
            pXMLDoc.Release();
        CoUninitialize();
    }
}


int main()
{
    SendData(L"http://localhost/login.php", L"kenwell", L"kenwell");
}