Code:
 string Response = "LOGIN_UNSUCCESSFUL";
                System.Net.WebRequest request = System.Net.WebRequest.Create("http://mywebsite.com/user.php");
                string postData = "&do=login&vb_login_username=" + Username.Text + "&vb_login_password=" + Password.Text  + "&HWID=" + GETHW.HWID;
                byte[] send = Encoding.Default.GetBytes(postData);
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                request.ContentLength = send.Length;
                Stream sout = request.GetRequestStream();
                sout.Write(send, 0, send.Length);
                sout.Flush();
                sout.Close();
                WebResponse res;
                try
                {
                    res = request.GetResponse();
                    StreamReader sr = new StreamReader(res.GetResponseStream());
                    Response = sr.ReadToEnd();
                }
I need to find some libraries for C++ to request a response like this C# program I made does. It sends the request with the specified data, then the script runs, echos a response and the program takes the response and uses it.

Thanks.