Post request without libraries (WIP)

int postRequest() {
    WSAData wsaData;
    WORD DllVersion = MAKEWORD(2, 1);
    if (WSAStartup(DllVersion, &wsaData) != 0) {
        MessageBoxA(NULL, "Cannot start up the ", "error1", MB_OK);
            exit(1);
    }
    SOCKADDR_IN addr;
    int sizeofaddr = sizeof(addr);
    addr.sin_addr.s_addr = inet_addr("185.27.134.141");
    addr.sin_port = htons(80);
    addr.sin_family = AF_INET;
    SOCKET Connection = socket(AF_INET, SOCK_STREAM, NULL);
    if (connect(Connection, (SOCKADDR*)&addr, sizeofaddr) != 0) {
        MessageBoxA(NULL, "error2", "error2", MB_OK);
        return 0;
    }
    char header[] = "POST /searchLevel.php HTTP/1.1\r\n"
        "Host: dnz2dnz2y29zog8.epizy.com\r\n"
        "Content-Type: application/x-www-form-urlencoded\r\n"
        "Content-Length: 10\r\n"
        "Connection: close\r\n"
        "\r\n"
        "author=lol";
    send(Connection, header, strlen(header), 0);
}