// 参数： 
 
 //     szTarget目标地址（可以是域名、IP地址） 
 
 //     dwTime返回时间；如果是超时，等于INFINITE 
 
 BOOL Ping(LPCTSTR szTarget, DWORD &dwTime) 
 
 { 
 
     BOOL bSuccess = FALSE; 
 
     dwTime = INFINITE; 
 
  
 
     if(szTarget == NULL) 
 
     { 
 
         TRACE0("Target Is NULL\n"); 
 
         return FALSE; 
 
     } 
 
  
 
     TCHAR szCmdLine[80]; 
 
     if(_sntprintf(szCmdLine, sizeof(szCmdLine) / sizeof(TCHAR), 
 
         _T("ping.exe -n 1 %s"), szTarget) == sizeof(szCmdLine) / sizeof(TCHAR)) 
 
     { 
 
         TRACE0("Target Is Too Long\n"); 
 
         return FALSE; 
 
     } 
 
  
 
     HANDLE hWritePipe = NULL; 
 
     HANDLE hReadPipe = NULL; 
 
     HANDLE hWriteShell = NULL; 
 
     HANDLE hReadShell = NULL; 
 
  
 
     SECURITY_ATTRIBUTES  sa; 
 
     memset(&sa, 0, sizeof(sa)); 
 
     sa.nLength = sizeof(sa); 
 
     sa.bInheritHandle = TRUE; 
 
     sa.lpSecurityDescriptor = NULL; 
 
  
 
     if(CreatePipe(&hReadPipe, &hReadShell, &sa, 0) 
 
         && CreatePipe(&hWriteShell, &hWritePipe, &sa, 0)) 
 
     { 
 
         STARTUPINFO            si; 
 
         memset(&si, 0, sizeof(si)); 
 
         si.cb           = sizeof(si); 
 
         si.dwFlags      = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES; 
 
         si.hStdInput    = hWriteShell; 
 
         si.hStdOutput   = hReadShell; 
 
         si.hStdError    = hReadShell; 
 
         si.wShowWindow  = SW_HIDE; 
 
          
 
         PROCESS_INFORMATION    pi; 
 
         memset(&pi, 0, sizeof(pi)); 
 
          
 
         int nMin = -1, nMax = -1, nAvg = -1; 
 
         if(CreateProcess(NULL, szCmdLine, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi)) 
 
         { 
 
             if(WaitForSingleObject(pi.hProcess, 10000) == WAIT_OBJECT_0) 
 
             { 
 
                 TCHAR szBuffer[1024]; 
 
                 DWORD dwBytes; 
 
                 if(ReadFile(hReadPipe, szBuffer, sizeof(szBuffer), &dwBytes, NULL)) 
 
                 { 
 
                     szBuffer[dwBytes] = '\0'; 
 
  
 
                     LPTSTR lpszTime = NULL; 
 
                     lpszTime = _tcsstr(szBuffer, _T("Request timed out")); 
 
                     if(lpszTime == NULL) 
 
                     { 
 
                         lpszTime = _tcsstr(szBuffer, _T("Minimum")); 
 
                         if(lpszTime != NULL) 
 
                         { 
 
                             if(_stscanf(lpszTime, _T("Minimum = %dms, Maximum = %dms, Average = %dms"), 
 
                                 &nMin, &nMax, &nAvg) == 3) 
 
                             { 
 
                                 TRACE3("%d, %d, %d\n", nMin, nMax, nAvg); 
 
  
 
                                 dwTime = nAvg; 
 
                                 bSuccess = TRUE; 
 
                             } 
 
                         } 
 
                         else 
 
                         { 
 
                             TRACE0("PING FORMAT is Error\n"); 
 
                         } 
 
                     } 
 
                     else 
 
                     { 
 
                         TRACE0("PING is Time Out\n"); 
 
  
 
                         bSuccess = TRUE; 
 
                     } 
 
                      
 
                 } 
 
             } 
 
             else 
 
             { 
 
                 TRACE1("Process(%d) is Time Out\n", pi.dwProcessId); 
 
                 TerminateProcess(pi.hProcess, 0); 
 
             } 
 
  
 
             CloseHandle(pi.hThread); 
 
             CloseHandle(pi.hProcess);