---
title: ModeParameterBlockDescriptor
framework: IOKit
role: symbol
role_heading: Structure
platforms: [Mac Catalyst 13.0+, macOS 10.3+]
path: iokit/modeparameterblockdescriptor
---

# ModeParameterBlockDescriptor

## Declaration

```occ
typedef struct ModeParameterBlockDescriptor {
    ...
} ModeParameterBlockDescriptor;
```

## Overview

Overview General mode parameter block descriptor.

## Topics

### Instance Properties

- [BLOCK_LENGTH](iokit/modeparameterblockdescriptor/1555480-block_length.md)
- [DENSITY_CODE](iokit/modeparameterblockdescriptor/1555549-density_code.md)
- [NUMBER_OF_BLOCKS](iokit/modeparameterblockdescriptor/1555526-number_of_blocks.md)
- [RESERVED](iokit/modeparameterblockdescriptor/1555502-reserved.md)