How To Control Connection Timeout Value by Creating Second Thread

   #include <windows.h>
   #include <wininet.h>
   #include <iostream.h>

   DWORD WINAPI WorkerFunction( LPVOID ); 
   HINTERNET g_hOpen, g_hConnect;

   typedef struct 
   {
       CHAR* pHost;
       CHAR* pUser;
       CHAR* pPass;
   } PARM;

   void main()
   {
       CHAR    szHost[] = "localhost";
       CHAR    szUser[] = "JoeB";
       CHAR    szPass[] = "test";
       CHAR    szLocalFile[] = "localfile";
       CHAR    szRemoteFile[] = "remotefile";
       DWORD   dwExitCode;
       DWORD   dwTimeout;
       PARM    threadParm;

       g_hOpen = 0;
       if ( !( g_hOpen = InternetOpen ( "FTP sample", 
                                        LOCAL_INTERNET_ACCESS, 
                                        NULL, 
                                        0, 
                                        0 ) ) )
       {         
           cerr << "Error on InternetOpen: " << GetLastError() << endl;
           return ;
       }

       // Create a worker thread 
       HANDLE   hThread; 
       DWORD    dwThreadID;
       threadParm.pHost = szHost;
       threadParm.pUser = szUser;
       threadParm.pPass = szPass;

       hThread = CreateThread(
                     NULL,            // Pointer to thread security attributes 
                     0,               // Initial thread stack size, in bytes 
                     WorkerFunction,  // Pointer to thread function 
                     &threadParm,     // The argument for the new thread
                     0,               // Creation flags 
                     &dwThreadID      // Pointer to returned thread identifier 
                 );    

       // Wait for the call to InternetConnect in worker function to complete
       dwTimeout = 5000; // in milliseconds
       if ( WaitForSingleObject ( hThread, dwTimeout ) == WAIT_TIMEOUT )
       {
           cout << "Can not connect to server in " 
                << dwTimeout << " milliseconds" << endl;
           if ( g_hOpen )
   InternetCloseHandle ( g_hOpen );
           // Wait until the worker thread exits
           WaitForSingleObject ( hThread, INFINITE );
           cout << "Thread has exited" << endl;
           return ;
       }
    
       // The state of the specified object (thread) is signaled
       dwExitCode = 0;
       if ( !GetExitCodeThread( hThread, &dwExitCode ) )
       {
           cerr << "Error on GetExitCodeThread: " << GetLastError() << endl;
           return ;
       }

       CloseHandle (hThread);
       if ( dwExitCode )
       // Worker function failed
          return ;
    
       if ( !FtpGetFile ( g_hConnect, 
                          szRemoteFile,
                          szLocalFile,
                          FALSE,INTERNET_FLAG_RELOAD, 
                          FTP_TRANSFER_TYPE_ASCII,
                          0 ) )
       {
           cerr << "Error on FtpGetFile: " << GetLastError() << endl;
           return ;
       }

       if ( g_hConnect )
           InternetCloseHandle( g_hConnect );
       if ( g_hOpen )
           InternetCloseHandle( g_hOpen );

       return ;
   }

   /////////////////// WorkerFunction ////////////////////// 
   DWORD WINAPI 
   WorkerFunction(
       IN LPVOID vThreadParm
   )
   /*
   Purpose:
       Call InternetConnect to establish a FTP session  
   Arguments:
       vThreadParm - points to PARM passed to thread
   Returns:
       returns 0  
   */ 
   {
       PARM* pThreadParm;
       // Initialize local pointer to void pointer passed to thread
       pThreadParm = (PARM*)vThreadParm;
       g_hConnect = 0;
    
       if ( !( g_hConnect = InternetConnect (
                                g_hOpen, 
                                pThreadParm->pHost,
                                INTERNET_INVALID_PORT_NUMBER,
                                pThreadParm->pUser,
pThreadParm->pPass,
                                INTERNET_SERVICE_FTP, 
                                0,
                                0 ) ) )
       {
           cerr << "Error on InternetConnnect: " << GetLastError() << endl;
           return 1; // failure
       }
       
       return 0;  // success
   }