C:\Program Files (x86)\The Bat!\batsound.exe "C:\Windows\Media\notify.wav"

#ifndef _CRT_SECURE_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#endif // !_CRT_SECURE_NO_WARNINGS
#include <time.h>
#include <stdio.h>
#include <tchar.h>
#include <Windows.h>

#pragma comment (lib, "winmm.lib")

#define DEFAULT_TIMEOUT      10
#define PROGRAM_GUID      _T("F343833A-CC2D-4F9B-A619-AEA408E0CC2C")
#define SND_MAILBEEP      _T("MAILBEEP")

int _tWinMain(HINSTANCE hInst, HINSTANCE hPrev, LPTSTR lpCmdLine, int nCmdShow)
{
   HANDLE hMutex = CreateMutex(NULL, TRUE, PROGRAM_GUID);
   if (GetLastError() == ERROR_ALREADY_EXISTS) {
      CloseHandle(hMutex);
      return 1;
   }
   time_t last;
   FILE *fp;
   int timeout = __argc > 2 ?_tstoi(__targv[2]) : DEFAULT_TIMEOUT;
   TCHAR szTmpDir[MAX_PATH], szFile[MAX_PATH + _MAX_FNAME];
   GetTempPath(sizeof(szTmpDir), szTmpDir);
   _stprintf_s(szFile, _T("%s\\%s"), szTmpDir, PROGRAM_GUID);
   if (fp = _tfopen(szFile, _T("r+"))) {
      if(EOF != _ftscanf(fp, _T("%lli"), &last)) {
         time_t diff = time(NULL) - last;
         if (diff < timeout)
            return 1;
      }
   }
   else {
      if(!(fp = _tfopen(szFile, _T("w"))))
         return 1;
   }
   if (__argc > 1)
      PlaySound(__targv[1], NULL, SND_FILENAME);
   else
      PlaySound(SND_MAILBEEP, NULL, SND_ALIAS);
   fseek(fp, 0, SEEK_SET);
   _ftprintf(fp, _T("%lli"), time(NULL));
   fclose(fp);
   CloseHandle(hMutex);
   return 0;
}