---
title: readMCN
framework: kernel
role: pseudoSymbol
path: kernel/iocdmedia/1811424-readmcn
---

# readMCN

## Declaration

```occ
virtual IOReturn readMCN(
 CDMCNmcn); 
```

## Parameters

- `mcn`: Buffer for the MCN data. Buffer contents will be zero-terminated.

## Return Value

Return Value Returns the status of the operation.

## Overview

Overview Read the Media Catalog Number (also known as the Universal Product Code).

## See Also

### Miscellaneous

- [getSpeed](kernel/iocdmedia/1811353-getspeed.md)
- [getTOC](kernel/iocdmedia/1811363-gettoc.md)
- [read](kernel/iocdmedia/1811376-read.md)
- [readCD()](kernel/iocdmedia/1811386-readcd.md)
- [readCD()](kernel/iocdmedia/1811393-readcd.md)
- [readDiscInfo](kernel/iocdmedia/1811402-readdiscinfo.md)
- [readISRC](kernel/iocdmedia/1811412-readisrc.md)
- [readTOC](kernel/iocdmedia/1811431-readtoc.md)
- [readTrackInfo](kernel/iocdmedia/1811438-readtrackinfo.md)
- [setSpeed](kernel/iocdmedia/1811448-setspeed.md)