How to find IP Addresses of Machines on LAN

hi,
i want to design an application that can tell the IP addresses of the machines(computers, routers etc) that are connected to a LAN. is there any way to do it. can someone tell me how can i do it or may give me some references of the related material. bye. looking forward to your replies.

Use NetServerEnum function. See about it in MSDN and sample code after remarks. When you get names of computers with this function, U mast call gethostbyname to retrieve IP.