# _CP_fileunlock

_CP_fileunlock is equivalent to the `fileunlock *expression*` BASIC statement.

## Syntax

```
int _CP_fileunlock(int expression)
```

## Description

This function returns -1 if
an error occurs. The error code is contained in _CP_errno.

## See also

- [C functions overview](https://d3codex.com/cfunctions/c-functions-overview/)

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Source: https://d3codex.com/cfunctions/cp-fileunlock/ - part of the D3Codex reference.