since you're using winpcap, this is another filter option... like i've suggested before, get familiar with your filtering options. you really have to download and learn to use wireshark, this would allow you to see the capabilities of winpcap.
See
dst host host:
http://www.mirrorservice.org/sites/ftp.wiretapped.net/pub/security/packet-capture/winpcap/docs/docs31/html/group__language.html[
^]
...And here's the wireshark site:
http://www.wireshark.org/[
^]
P.S. Not sure what you're trying to build, but it seems like you're trying to build wireshark. Maybe you need to stop and take the time to see what that tool has and if its something you can use.