Get URL from IP Address

You can't.
The relation between URL and IP is not 1/1, and URLs are more abstract concept than IPs: They are tailored to different purposes: The URL tells WHAT page you want, the IP tells WHERE it can be found.

The mapping between IP names and IP addresses id managed by a hierarchical redundant distributed database called "Domain Name System", whose API are represented by the get_host_by_name and get_name_by_host functions.

Whatever the DNS returns to a call or the other does not depend on you, ant it is not required by the DNS standard for that calls to represent an involution (hence get_name_by_host(get_host_by_name(name)) != name),

Basically you question sounds like "Is there a way to get the name of Smith?", in a world that has many even unrelated people having "Smith" as a surname.

uh, that doesn't get a URL, it gets the IP address (binary) as a standard IP address as a string of characters with the dots between the numbers.

Oh, BTW, the sockAddr.sin_addr.s_addr field might be real useful to you in the other question you asked about comparing addresses.

GOT IT!

HOSTENT *pHostEnt;
			int  **ppaddr;
			SOCKADDR_IN sockAddr;
			char* addr;
			pHostEnt = gethostbyname( "www.codeproject.com");
			ppaddr = (int**)pHostEnt->h_addr_list;
			sockAddr.sin_addr.s_addr = **ppaddr;
			addr = inet_ntoa(sockAddr.sin_addr);  //this is your ip address
			printf("\n   Code %s\n",addr);