void fileupload::upload()
{
    String url = "https://validurl/transfer.php";
    httprequest r(url);
    String fn = "C:/upp/out/MyApps/MSBT17.Gui/test.pdf";
    String s = LoadFile(fn); 
    r.POST();
    r.Part("file", s , "multipart/form-data", fn);

    r.Part("username", FTPUSER , "multipart/form-data");
    r.Part("password", FTPPASS , "multipart/form-data");
  
    r.Execute();   
}