C / C++ / MFC

try{
    CString strHeaders = _T("Content-Type: application/x-www-form-urlencoded");
    CString strFormData = _T("afsender=boetos&modtager=5555554578&besked=this+is+a+test");

    CInternetSession session;
    CHttpConnection* pConnection = session.GetHttpConnection(_T("212.112.128.11"));
    if (pConnection)
    {
        CHttpFile* pFile = pConnection->OpenRequest(CHttpConnection::HTTP_VERB_POST, _T("/res.asp"));
        ASSERT(pFile);
        BOOL result = pFile->SendRequest(strHeaders, (LPVOID)(LPCTSTR)strFormData, strFormData.GetLength());
        if (result)
        {
            CString strData;
            CString strBuff;
            while (pFile->ReadString(strBuff))
            {
                strData += strBuff;
                strBuff.Empty();
            }

            //AfxMessageBox(strData);
            FILE *f=fopen("res.html", "w");
            if (f)
            {
                fprintf(f, strData);
                fclose(f);
            }

            AfxMessageBox("Done!");


            pFile->Close();
            delete pFile;
        }
    }
    pConnection->Close();
    delete pConnection;

}
catch (CInternetException* pEx)
{
    // catch errors from WinINet
    pEx->ReportError();
    pEx->Delete();
    return;
}