public static RegistryKey openSubkey(RegistryKey topKey, String keyName, int access) {
		RegistryKey subKey = null;

		try {
			subKey = topKey.openSubKey(keyName, access);
		} catch (NoSuchKeyException ex) {
			subKey = null;
		} catch (RegistryException ex) {
			subKey = null;
		}

		return subKey;
	}