convert actual address"www" to IP

How can i convert a simple address like to IP address x.x.x.x format?
A little tut through the needed functions like inet_ntoa would be cool, because i can't figure this out by myself.
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Here you go, I ran into that problem recently.. what you want to use is gethostbyname().. some of these includes might be overkill, but that's all I used in my program.

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/time.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <netdb.h>

struct in_addr* resolve_addr(char *host)
        struct hostent *h;
        static struct in_addr addr;
        //if host name empty, return null
        if (host == NULL || strlen(host) == 0)
                return NULL;

        //check to see if value entered was an IP
        addr.s_addr = inet_addr(host);
        if (addr.s_addr != -1)
                return &addr;

        //check to see if value entered was a host name
        h = gethostbyname(host);
        if (h!= NULL)
                return (struct in_addr *) *h->h_addr_list;

        //if neither worked, return NULL
        return NULL;

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skiritis13Author Commented:
What i was really looking for is this in "for windows" format because currently i can't run linux.
Anyway i made it win-ed my self( the code is the same, i just changed the headers ) but gethostbyname keeps returning null.I run into the msdn and it was very clear to use getaddrinfo in the place of gethostbyname. Any point on how to use getaddrinfo and the struct addrinfo or should i stick with the above code block?
Again: in the above gethostbyname keeps returning NULL.
skiritis13Author Commented:
Anyway i just made it work.Thanx for the code!
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