SetConsoleCtrlHandler演示

#include "stdafx.h"
#include <Windows.h>

static BOOL WINAPI Handler(DWORD cntrlEvent);
static BOOL exitFlag = FALSE;

int _tmain(int argc, LPTSTR argv[])

/* Beep periodically until signaled to stop. */
{
       /* Add an event handler. */
   if (SetConsoleCtrlHandler(Handler, TRUE)==FALSE)
       printf("Unable to install handler!\n");

   while (!exitFlag) { /* This flag is detected right after a beep, before a handler exits */
       Sleep(4750); /* Beep every 5 seconds; allowing 250 ms of beep time. */
       Beep(1000 /* Frequency */, 250 /* Duration */);
   }
   _tprintf(_T("Stopping the main program as requested.\n"));
   return 0;
}

BOOL WINAPI Handler(DWORD cntrlEvent)
{
   switch (cntrlEvent) {
       /* The signal timing will determine if you see the second handler message */
       case CTRL_C_EVENT:
           _tprintf(_T("Ctrl-C received by handler. Leaving in 5 seconds or less.\n"));
           exitFlag = TRUE;
           Sleep(4000); /* Decrease this time to get a different effect */
           _tprintf(_T("Leaving handler in 1 second or less.\n"));
           return TRUE; /* TRUE indicates that the signal was handled. */
       case CTRL_CLOSE_EVENT:
           _tprintf(_T("Close event received by handler. Leaving the handler in 5 seconds or less.\n"));
           exitFlag = TRUE;
           Sleep(4000); /* Decrease this time to get a different effect */
           _tprintf(_T("Leaving handler in 1 second or less.\n"));
           return TRUE; /* Try returning FALSE. Any difference? */
       default:
           _tprintf(_T("Event: %d received by handler. Leaving in 5 seconds or less.\n"), cntrlEvent);
           exitFlag = TRUE;
           Sleep(4000); /* Decrease this time to get a different effect */
           _tprintf(_T("Leaving handler in 1 seconds or less.\n"));
           return TRUE; /* TRUE indicates that the signal was handled. */
   }
}

巴特西

SetConsoleCtrlHandler演示

最新文章

热门文章