---
title: OS_SIGNPOST_ID_NULL
framework: os
role: symbol
role_heading: Macro
path: os/os_signpost_id_null
---

# OS_SIGNPOST_ID_NULL

The signpost identifier that represents a disabled signpost.

## Declaration

```occ
#define OS_SIGNPOST_ID_NULL
```

## See Also

### Using Built-in Signpost Identifiers

- [OS_SIGNPOST_ID_EXCLUSIVE](os/os_signpost_id_exclusive.md)
- [OS_SIGNPOST_ID_INVALID](os/os_signpost_id_invalid.md)