#import "C:\\Windows\\System32\\winhttp.dll" no_namespace

void CHttpTestDlg::OnBnClickedButton1()

{

    CoInitialize(NULL);

    IWinHttpRequestPtr pHttpReq = NULL;

    HRESULT hr;

    //hr = pHttpReq.CreateInstance(_T("WinHttp.WinHttpRequest.5.1"));

    hr = pHttpReq.CreateInstance(__uuidof(WinHttpRequest));

    if (FAILED(hr))

    {

        CoUninitialize();

        return;

    }

    hr = pHttpReq->Open(_T("GET"), _T("http://www.baidu.com"));

    if (FAILED(hr))

    {

        CoUninitialize();

        return;

    }

    hr = pHttpReq->Send();

    if (FAILED(hr))

    {

        CoUninitialize();

        return;

    }

    CString respStr = pHttpReq->ResponseText;

    MessageBox(respStr);

    CoUninitialize();

}