# %startfileio() function

Specifies that all input comes from the input file and all output goes to the output
 file.

**UNIX:**Not Supported

## Syntax

```
%startfileio(file path names)
```

## Description

The FlashBASIC tab of the D3 Device Manager contains the default path of the input and output
 files. See the D3 System Administration Guide for more information.

## Example(s)

The file path name specified in the D3 Device Manager and the %startfileio
 C function has the following format:

```
"inputfile" ; "outputfile" , size; "debug inputfile" ; "debug outputfile" , size
```

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