# u (user exit) processing code

AQL user exits allow direct access to system functions.

| System Processors | Select, Update, List |
| --- | --- |
| Code Type | Attribute Defining |
| Dictionary Attributes | Input Conversion, Output Conversion, Correlative |

## Syntax

```
u mode.ID
```

## Parameters

| mode.ID | Virtual jump entry number identifying the subroutine. |
| --- | --- |

## See also

- [Processing codes overview](https://d3codex.com/processingcodes/processing-codes-overview/)
- [AQL user exits](https://d3codex.com/access/aql-user-exits/)

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Source: https://d3codex.com/processingcodes/u-user-exit-processing-code/ - part of the D3Codex reference.