---
name: "DMX"
section: "3x"
platform: "linux"
package: "libdmx-dev"
version: "1:1.0.2-2"
release: "Debian 4.0 (Etch)"
platforms: ["linux"]
url: "https://new.carta.tech/DMX/3x"
---

# DMX(3x)

X Window System DMX (Distributed Multihead X) extension

## NAME

DMX - X Window System DMX (Distributed Multihead X) extension

## DESCRIPTION

The DMX extension provides support for communication with and control of [**Xdmx**(1)](/Xdmx/1.md) server.  Attributes of the [**Xdmx**(1)](/Xdmx/1.md) server and of the back-end screens attached to the server can be queried and modified via this protocol.

## SUMMARY OF LIBRARY FUNCTIONS

The following is a summary of DMX library functions:

DMXQueryExtension(3X) - determine if DMX is available

DMXQueryVersion(3X) - determine DMX extension version

DMXSync(3X) - flush protocol requests between [**Xdmx**(1)](/Xdmx/1.md) and back-end X servers

DMXForceWindowCreation(3X) - force immediate back-end window creation

DMXGetScreenCount(3X) - determine number of back-end screens

DMXGetScreenAttributes(3X) - determine back-end screen attributes

DMXChangeScreensAttributes(3X) - change back-end screen attributes

DMXAddScreen(3X) - attach a new back-end screen

DMXRemoveScreen(3X) - detach a back-end screen

DMXGetWindowAttributes(3X) - determine back-end window attributes

DMXGetDesktopAttributes(3X) - determine global bounding box

DMXChangeDesktopAttributes(3X) - change global bounding box

DMXGetInputCount(3X) - determine number of input devices

DMXGetInputAttributes(3X) - determine input device attributes

DMXAddInput(3X) - attach a new backend or console input

DMXRemoveInput(3X) - detach an input

DMXAddBackendInput(3X) - attach a new back-end input

DMXAddConsoleInput(3X) - attach a new console input

Each of these functions is described in its own man page.

## SEE ALSO

[**Xdmx**(1)](/Xdmx/1.md), [**xdmxconfig**(1)](/xdmxconfig/1.md), [**vdltodmx**(1)](/vdltodmx/1.md)