Quote

cpan> install Net::Pcap
Database was generated on Fri, 12 Jul 2013 10:15:20 GMT
Running install for module 'Net::Pcap'
Running make for S/SA/SAPER/Net-Pcap-0.17.tar.gz
Checksum for C:\strawberry\cpan\sources\authors\id\S\SA\SAPER\Net-Pcap-0.17.tar.gz ok
Scanning cache C:\strawberry\cpan\build for sizes
............................................................................DONE

CPAN.pm: Building S/SA/SAPER/Net-Pcap-0.17.tar.gz

socket.h patched... ok
looking for -lwpcap... yes
checking for pcap_lib_version() in -lwpcap... no
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You appear to lack the WinPcap developer pack.

If it is installed in a non-standard location, please try setting the LIBS
and INC values on the command line. For instance, if you have unziped the
developer's pack in C:\WpdPack, you should execute:

perl Makefile.PL INC=-IC:/WpdPack/Include "LIBS=-LC:/WpdPack/Lib -lwpcap"

Or get and install the WinPcap developer's pack from
http://www.winpcap.org/install/
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detecting available functions... ok
Checking if your kit is complete...
Looks good
Warning (mostly harmless): No library found for -lwpcap
Writing Makefile for Net::Pcap