What is the exact method to create a hidden registry key using Native API?

To create a hidden registry key, you must use Native API functions (e.g., `NtCreateKey`) with an `OBJECT_ATTRIBUTES` structure that correctly sets the string length to include the leading `\0`. The key name should begin with `\0` followed by any non‑digit character. A reference implementation, based on Dan Madden’s work, is available in the article Penetration Techniques - Creating "Hidden" Registry Entries.