// Time out is set to 1,000 ticks.
VM_WDT_HANDLE handle = vm_wdt_start(1000);

// Check the return value.
if (handle >= 0) {
    // Do something.
    vm_wdt_reset(handle);
} else {
    // Do error logging.
}

// Do something.
vm_wdt_reset(handle);

// Done with the watchdog timer.
vm_wdt_stop(handle);