---
title: Mask
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/version_check_atom/mask
---

# Mask

The mask for a binary AND operation on the Gestalt bitfield.

## See Also

### Data fields

- [Size](quicktime-file-format/version_check_atom/size.md)
- [Type](quicktime-file-format/version_check_atom/type.md)
- [Flags](quicktime-file-format/version_check_atom/flags.md)
- [Software package](quicktime-file-format/version_check_atom/software_package.md)
- [Version](quicktime-file-format/version_check_atom/version.md)
- [Check type](quicktime-file-format/version_check_atom/check_type.md)