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Source code

#include <stdio.h>
#include <windows.h>
#include <iostream>
#include <string>
using namespace std;

bool closing = false;
CRITICAL_SECTION cs;
string stri;
int i;

BOOL WINAPI consolehandler(DWORD _event)
{
 switch(_event) {
 case CTRL_C_EVENT:
  break;
 case CTRL_BREAK_EVENT:
  break;
 case CTRL_CLOSE_EVENT:
  EnterCriticalSection(&cs);
  closing = true;
 LeaveCriticalSection(&cs);
  break;
 case CTRL_LOGOFF_EVENT:
  break;
 case CTRL_SHUTDOWN_EVENT:
  break;
 }
 return TRUE;
} 
int main() {
 SetConsoleCtrlHandler((PHANDLER_ROUTINE)consolehandler, 1);
 InitializeCriticalSection(&cs);
 bool t_closing;
 while (1)
 {
  i++;
  cout << i;
  /* Programmende Event***************** */
  EnterCriticalSection(&cs);
  t_closing = closing;
  LeaveCriticalSection(&cs);
  if (t_closing) break;
  Sleep(5);
 }
 MessageBox(HWND_DESKTOP, "Das Programm wird beendet", MB_OK, MB_ICONQUESTION);
 return 0;
}