<!--
{
  "documentType" : "article",
  "framework" : "Vision",
  "identifier" : "/documentation/Vision/Vision-macros",
  "metadataVersion" : "0.1.0",
  "role" : "collectionGroup",
  "title" : "Macros"
}
-->

# Macros

## Topics

### Macros

[`#define VN_EXPORT`](/documentation/Vision/VN_EXPORT)

[`#define VN_EXTERN_C_BEGIN`](/documentation/Vision/VN_EXTERN_C_BEGIN)

[`#define VN_EXTERN_C_END`](/documentation/Vision/VN_EXTERN_C_END)


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)