Following is a code that gets local machine IP addresses. The advantages over the article by Jeff Lundgren are that my code recognises ALL IP addresses and is ready for IPv6 ;-)
char szHostName[128];
if( gethostname(szHostName, 128) == 0 )
{
// Get host adresses
struct hostent * pHost;
int i;
pHost = gethostbyname(szHostName);
for( i = 0; pHost!= NULL && pHost->h_addr_list[i]!= NULL; i++ )
{
CString str;
int j;
addr.Format("%u", (unsigned int)((unsigned
char*)pHost->h_addr_list[i])[j]);
str += addr;
}
// str now contains one local IP address - do whatever you want to do with it (probably add it to a list)
}
}