https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-getexitcodeprocess
واگرهم از mfc استفاده میکنید
DWORD pid HANDLE process = OpenProcess(SYNCHRONIZE, FALSE, pid); DWORD ret = WaitForSingleObject(process, 0); CloseHandle(process); return ret == WAIT_TIMEOUT;