DouKaku?

#include <atlbase.h>
#include <msxml6.h>
#pragma comment(lib, "msxml6.lib")

#include <iostream>
#include <stdexcept>
#include <string>

struct CoInitializer
{
    CoInitializer()
    {
        CoInitialize(NULL);
    }
    ~CoInitializer()
    {
        CoUninitialize();
    }
};

void check(HRESULT hr, const std::string& name)
{
    if (FAILED(hr))
    {
        throw std::runtime_error("invocation of " + name);
    }
}

int main()
{
    try
    {
        CoInitializer init;

        CComPtr<IXMLDOMDocument> doc;

        check(doc.CoCreateInstance(CLSID_DOMDocument), "CoCreateInstance");

        check(doc->put_async(VARIANT_FALSE), "put_async");

        VARIANT_BOOL isSuccessful;

        check(doc->load(CComVariant("http://ja.doukaku.org/feeds/comments/"), &isSuccessful), "load");

        if (isSuccessful == VARIANT_FALSE)
        {
            throw std::runtime_error("load failed");
        }

        CComPtr<IXMLDOMNode> node;

        check(doc->selectSingleNode(CComBSTR(L"//lastBuildDate"), &node), "selectSingleNode");

        if (! node)
        {
            throw std::runtime_error("node 'lastBuildDate' not found");
        }

        CComBSTR text;

        check(node->get_text(&text), "get_text");

        USES_CONVERSION; // needed for W2A()

        std::cout << W2A(text) << std::endl;
    }
    catch (std::exception& e)
    {
        std::cerr << "error: " << e.what() << std::endl;

        return -1;
    }

    return 0;
}