---
title: DuplexModes
summary: API reference for the DuplexModes enum.
status: draft
owner: <owner>
last_reviewed: 2026-07-24
library: SAIF.Services.Printing.Remote
reference_type: package
---

# DuplexModes

`DuplexModes` is a public enumeration defining the controlled vocabulary for duplex printing modes used by `clsXPrintControl.DuplexMode`. Each member maps to a fixed 5-character database code stored in `XPRINT_CONTROL.DUPLEX_CODE` and related columns. See [BR-004](../../business-rules.md#br-004-duplex-mode-controlled-vocabulary).

## Purpose
- Provide a type-safe vocabulary for duplex printing mode selection.
- Translated to/from fixed database codes by `clsXPrintControl.DuplexMode`.

## Context
- Namespace: `SAIF.Services.Printing.Remote`
- Assembly/package: `SAIF.BOF.Services.Printing.Remote`
- Defined in: `Enums.vb`

## Public members

| Member | Signature | Purpose |
| --- | --- | --- |
| `SIMPLEX` | `SIMPLEX = 0` | Single-sided printing; maps to database code `SIMPL`. Default enum value (ordinal 0). |
| `VERTICAL` | `VERTICAL` | Vertical duplex printing; maps to database code `VERTL`. |
| `HORIZONTAL` | `HORIZONTAL` | Horizontal duplex printing; maps to database code `HORIZ`. |
| `DEFLT` | `DEFLT` | Default system duplex setting; maps to database code `DEFLT`. |

## Behavioral notes
- `clsXPrintControl.DuplexMode` getter maps the stored 5-character code to the enum value; unrecognized codes fall through `Select Case` with no explicit `Return`, implicitly yielding `SIMPLEX` (ordinal 0).**
- The setter maps the enum value to the 5-character code for `DuplexCode` storage.
- The same 5-character codes appear in `XDOCUMENT.DUPLEX_CODE` and `XDEFERRED_PRINT.DUPLEX_CODE`, but those columns are stored as raw strings without explicit translation in their respective classes.*

## Constraints and usage notes
- Only the four defined members have reliable round-trip storage; any other code stored in the database will not map to a named member.**
- All four valid codes are exactly 5 characters (`SIMPL`, `VERTL`, `HORIZ`, `DEFLT`).

> **Note:** Statements marked with `*` were inferred from code structure, naming conventions, or contextual evidence where direct confirmation was not available in source artifacts. Statements marked with `**` could not be confirmed; treat as unknown until verified.

## Sources
- `Services\SAIF.Services.Printing.Remote\Enums.vb`
- `Services\SAIF.Services.Printing.Remote\clsXPrintControl.vb`