hi i m new in vc++ enviroment i have an problem arrived
i have a code of udpdump which capture a packet from network and show but it is in dot c extension class i have rewrite this code in vc soo i made object of class udpdump and use in my another program
but it had 2 error when i make a header files and source file for this class can anyone help me i required a urgent response

the error which occur when i compile the code r

1-- UdpDum1.obj : error LNK2001: unresolved external symbol "struct pcap * __cdecl pcap_open(char const *,int,int,int,struct pcap_rmtauth *,char *)" (?pcap_open@@YAPAUpcap@@PBDHHHPAUpcap_rmtauth@@PAD@Z)

2--UdpDum1.obj : error LNK2001: unresolved external symbol "int __cdecl pcap_findalldevs_ex(char *,struct pcap_rmtauth *,struct pcap_if * *,char *)" (?pcap_findalldevs_ex@@YAHPADPAUpcap_rmtauth@@PAPAUpcap_if@@0@Z)

3--Debug/TestPacketCapturing.exe : fatal error LNK1120: 2 unresolved externals

will any body tell me the reason and solution of that error ???