c - Can't exitThread with waitForMultipleObjects -

i have 2 threads, first doing:`

while(1){      if(recv(conn_s, (char*) &i, sizeof(i),0)>0){          if(i==28){             setevent(event);             //printf("nell if di 28\n");             handle t;             sleep(1);             //terminatethread(scegli, 0);             //if (closehandle(scegli)==0) printf("error close\n");             t=createthread(null, 0, (lpthread_start_routine) avvia_conversazionecl, conn, synchronize, 0);             waitforsingleobject(t, infinite); 

the second one:

       const handle handles[2]={event, stdinhandle};         while(1){              switch(waitformultipleobjects(num, handles, false, 0)){                 case 0:                           exitthread(-1);                         break;                  case 1:                                     r=readconsole(stdinhandle, &interlocutore, nlength, &charsread, null);                                     if (r==0){                                         printf("%d\n", getlasterror());                                     }                                     //global_value_to_exit=1;                                     int size=strlen(interlocutore);                                      interlocutore[size-2]='\0';                                      int verifica=verifica_interlocutore(interlocutore);                                       if (verifica==0){                                          printf("interlocutore non disponibile, riprova: \n");                                          continue;                                     }                                        int rrr=send(socket, interlocutore, size, 0);                                     if (rrr<=0){                                         printf("send error\n");                                     }                                     sleep(1);                                     if(recv(socket, (char*) &ack, sizeof(int), 0)==socket_error){                                         printf("errore: %d\n", wsagetlasterror());                                     }                                     printf("ho ricevuto %d\n", (int) ack);                                     if(ack==999){                                          //sleep(1);                                          handle t;                                         dword tid;                                         t=createthread(null, 0, (lpthread_start_routine) avvia_conversazionecl, conn_s, 0, &tid);                                         waitforsingleobject(t, infinite);                                         closehandle(t);                                         //global_value_to_exit=0;                                         ack=0;                                         vis=createthread(null, 0, (lpthread_start_routine) visualizza_utenti, conn_s, 0, &visid);                                      }                                      //resetevent(stdinhandle);                                      break;                  case wait_failed:                                  perror("failed: \n");                                  break;     }      memset(interlocutore, 0, sizeof(interlocutore)); }      return null;  } 

also:

  const handle handles[2]={event, stdinhandle};     event=createevent(null, false, false, null);     stdinhandle=getstdhandle(std_input_handle);` 

the point is: if write in console things second thread, if 28 receive make second thread exit sett signaled event. @ point waitformultipleobjects should case 0 , exit thread. instead after i've recv 28 , changed status of event, if write in console second thread enters case 1. after writing else seems dead

any advice?