Код:
#include <windows.h>
#include <winsock2.h>
#include <stdio.h>

#define REMOTE_ADDR  "127.0.0.1"
#define DEF_HTTP_PORT 80

int main(void)
{
        WSADATA wsd;
        struct sockaddr_in addr;
        
        if( WSAStartup( MAKEWORD(2,2),&wsd ) == 0)
        {
                puts("WIndows socket interface is loaded");

                addr.sin_addr.s_addr = inet_addr(REMOTE_ADDR);
                addr.sin_family      = AF_INET;
                addr.sin_port        = htons(DEF_HTTP_PORT);
                SOCKET lsocket       = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
              
                if( lsocket != -1 )
                {
                         unsigned int addrLen = sizeof(addr);
                         if( connect(lsocket,(SOCKADDR*)addr,addrLen ) == 0 )
                         {
                                   puts("Connected to server\n");
                         }
                         else
                         {
                                   printf("Error : %d\n", WSAGetLastError());
                         }
                }
                else
                {
                         puts("Could not create socket");
                }
       }
       else
       {
                puts("Could not load windows socket interface");
       }
}