Packet sniffing in c under window OS

Question

I want to sniff network packets without wincap library, kindly give me some hints or direction so that I can make it possible.

Answer 1

You could start to do kernel level programming and catch there the packets. This is for sure complicated but you'll learn much.

Answer 2

You know, libpcap exists for a reason: It does something that's necessary.

You need to set up a system-level hook for TCP/IP events, and the way global hooks work means you need to do this from a DLL.

Having hooked those events, you have to figure out the contents of the packets you get.

Are you sure you want to re-invent this wheel?

I found some introductory info on hooking Windows events here.