How to get data automatically from tcp sockets winsock2

  ifndef TCP_H
    #define TCP_H

    #pragma once
    #include <winsock2.h>
    #include <ws2tcpip.h>
    #include <iostream>
    #include "config.h"
    #include "tcp_packets.h"
    #include "change_ending.h"
    #include "md5.h"
    #pragma comment(lib, "Ws2_32.lib")

    class CTcpClient
    {
    private:
    char* szServerName;
    char*   Port;
    SOCKET ConnectSocket;
    md5checksum Md5Var;

    public:
        int Size;
        bool Send(char* szMsg,int len);
        CTcpClient(char* servername,char* port)
        {
            Port=port;
            szServerName = servername;
            ConnectSocket = INVALID_SOCKET;
            Size=0;


        }

        bool Start();
        void Stop();
        // Free the resouces




        // Receive message from server
         char recvbuf[DEFAULT_BUFFER_PKT_LENGTH];
        void Recv();


    };
#endif // TCP_H

#include "tcp.h"
#include "config.h"

bool CTcpClient::Start() {
        WSADATA wsaData;

        // Initialize Winsock
        int iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
        if(iResult != 0)
        {
            printf("WSAStartup failed: %d\n", iResult);
            return false;
        }

        struct addrinfo *result = NULL,
                        *ptr = NULL,
                        hints;

        ZeroMemory(&hints, sizeof(hints));
        hints.ai_family = AF_UNSPEC;
        hints.ai_socktype = SOCK_STREAM;
        hints.ai_protocol = IPPROTO_TCP;
        //hints.ai_protocol = SOL_SOCKET;
        //Resolve the server address and port
        iResult = getaddrinfo(szServerName,Port, &hints, &result);
        if (iResult != 0)
        {
            printf("getaddrinfo failed: %d\n", iResult);
            WSACleanup();
            return false;
        }