# u3f user exit

The u3f user exit converts an ASCII
hexadecimal-format string to binary, and sends it to the printer.

## Syntax

```
results = oconv(str.exp, ’u3f’)
```

## Description

The ASCII hexadecimal characters
have to be in matched pairs. If a character with a single digit value
(less than x’10’) is to be printed, make sure there is a leading zero.

## Example(s)

```
stuff = "0D0A0000"
x = oconv(stuff,’u3f’)
```
Sends the hexadecimal string `"0D0A0000"` to the printer (CR/LF, and 2 nulls for linefeed delay.)

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Source: https://d3codex.com/pickbasic-flashbasic/u3f-user-exit/ - part of the D3Codex reference.