Przykładowo w 39dll, na szybko wygooglałem coś takiego:
GML
var _soc,_buff,ip,i;
ip=mplay_ipaddress();
ip=string(ip);
name=string(argument0);
dllinit(0,true,true);
_FP="/osarena/query.php?name="+name+"&ip="+ip;
_t=tcpconnect("1upgraphix.com",80,0);
setformat(_t, 1,chr(10) + chr(13)+chr(10));
writechars("GET "+_FP+" HTTP/1.1"+chr(13)+chr(10));
writechars("Host: 1upgraphix.com"+chr(13)+chr(10));
writechars("Connection: close"+chr(13)+chr(10));
writechars("Accept: */*"+chr(13)+chr(10));
writechars("Accept-Language: en-us"+chr(13));
writechars("User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; InfoPath.1; .NET CLR 2.0.50727; .NET CLR 1.1.4322) Web-Sniffer/1.0.24"+chr(13)+chr(10));
writechars("Referer: http://web-sniffer.net/"+chr(13)+chr(10));
sendmessage(_t);
a = receivemessage(_t); //receive http header (and ignore)
closesocket(_t);
return readchars(bytesleft());