# %dup() function

The %dup() function returns a new file
descriptor associated to the same file as the one associated with
 *file.descriptor*.

## Syntax

```
new.descriptor = %dup(file.descriptor)
```

## See also

- [%close() function](https://d3codex.com/pickbasic-flashbasic/percent-close-function/)
- [%rdhex() function](https://d3codex.com/pickbasic-flashbasic/percent-rdhex-function/)
- [%read() function](https://d3codex.com/pickbasic-flashbasic/percent-read-function/)
- [%whex() function](https://d3codex.com/pickbasic-flashbasic/percent-whex-function/)
- [%write() function](https://d3codex.com/pickbasic-flashbasic/percent-write-function/)
- [FlashBASIC C functions overview](https://d3codex.com/pickbasic-flashbasic/flashbasic-c-functions-overview/)
- [cfunction statement](https://d3codex.com/pickbasic-flashbasic/cfunction-statement/)

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Source: https://d3codex.com/pickbasic-flashbasic/percent-dup-function/ - part of the D3Codex reference.