Send GET Request in C to IPv6 web server on windows

I am trying to make a simple GET request to a webserver that has an IPv6 adress, and i does not work. My code has to be available on windows so I use the windows libraries, e.g.

#include <stdio.h>
#include <winsock2.h>
#pragma comment (lib, "Ws2_32.lib")
#include <windows.h>
#include <winuser.h>
#include <string.h>

Here is the part of the code that establishes the connection :

int portno = 825;
//yes, strange port number...
const char *adress = "[2a02:842a:86d1:d001:26dd:8d7a:8202:d9a3]";
WSADATA wsa;
SOCKET sockfd;
char message[4096] = "GET //page//index.php?data=somedata HTTP/1.1\r\nHost: [2a02:842a:86d1:d001:26dd:8d7a:8202:d9a3]\r\nUser-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0\r\nAccept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8\r\n\r\n");
struct hostent *server;
struct sockaddr_in6 serv_addr;
int bytes, sent, received, total;
char response[4096];
int iResult = WSAStartup(MAKEWORD(2,2),&wsa);
sockfd = socket(AF_INET6 , SOCK_STREAM , 0 );

//while debugging i noticed that this line does not work
server = gethostbyname(adress);

memset(&serv_addr,0,sizeof(serv_addr));
printf("1\n");
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(portno);
memcpy(&serv_addr.sin_addr.s_addr,server->h_addr,server->h_length);
connect(sockfd,(struct sockaddr *)&serv_addr,sizeof(serv_addr));

If anybody knows how to change this code so that it will allow IPv6 connections, please tell me :)