internal static extern bool FindNextPrinterChangeNotification(SafeNotificationHandle hChange, out PrinterChange pdwChange, PrinterNotifyOptions printerNotifyOptions, out SafePrinterNotifyInfo pPrinterNotifyInfo);
internal static extern SafeNotificationHandle FindFirstPrinterChangeNotification(SafeHPrinter hPrinter, PrinterChange fdwFlags, uint fdwOptions, ref PrinterNotifyOptions pPrinterNotifyOptions);