使用iphlpapi动态链接库函数实现ping功能

BOOL CAutoDlg::Ping(){typedefHANDLE(WINAPI * pCreate)(VOID);typedef BOOL(WINAPI *pClose)(HANDLE);typedef DWORD(WINAPI *pSend)(HANDLE,IPAddr,LPVOID,WORD,PIP_OPTION_INFORMATION,LPVOID,DWORD,DWORD);pCreate pIcmpCreate;pClosepIcmpClose;pSend pSendIcmp;HMODULE  hIcmp=LoadLibrary("iphlpapi.dll");pIcmpCreate=(pCreate)GetProcAddress(hIcmp,"IcmpCreateFile");pIcmpClose=(pClose)GetProcAddress(hIcmp,"IcmpCloseHandle");pSendIcmp=(pSend)GetProcAddress(hIcmp,"IcmpSendEcho");HANDLE iHandle;iHandle=pIcmpCreate();IPAddr pAddr;pAddr=(IPAddr)inet_addr("119.75.217.56");icmp_echo_reply pData;bool state=true;for(int i=1;i<=4;i++){pSendIcmp(iHandle,pAddr,NULL,0,NULL,(LPVOID)&pData,sizeof(icmp_echo_reply),0);if (pData.Status==0){pIcmpClose(iHandle);return TRUE;}}return FALSE;}