这个错是怎么回事啊，请教，在线等！

[singlehero]

--------------------Configuration: icmp - Win32 Debug--------------------
Compiling...
icmpDlg.cpp
Generating Code...
Skipping... (no relevant changes detected)
icmp.cpp
Linking...
icmpDlg.obj : error LNK2001: unresolved external symbol "int __stdcall IcmpCloseHandle(void *)" (?IcmpCloseHandle@@YGHPAX@Z)
icmpDlg.obj : error LNK2001: unresolved external symbol "unsigned long __stdcall IcmpSendEcho(void *,unsigned long,void *,unsigned short,struct ip_option_information *,void *,unsigned long,unsigned long)" (?IcmpSendEcho@@YGKPAXK0GPAUip_option_inform
ation@@0KK@Z)
icmpDlg.obj : error LNK2001: unresolved external symbol "void * __stdcall IcmpCreateFile(void)" (?IcmpCreateFile@@YGPAXXZ)
Debug/icmp.exe : fatal error LNK1120: 3 unresolved externals
Error executing link.exe.

icmp.exe - 4 error(s), 0 warning(s)

[nicolas2001]

好像是少了什么头文件！

[wkgenius]

没有链接.Lib文件。

[lsl7909]

可能缺少必需的头文件