Logitech LCD
The game can display contextual information on some (older) Logitech keyboards with built-in LCD.
Character selection / map change
World completion
Map completion
WvW (only available when you are in a WvW map)
Character stats
Character selection / map change
World completion (sometimes incorrectly reports 0 for waypoints, points of interest and vistas)
Map completion
WvW (only available when you are in a WvW map)
Character name, specialization and stats
Specialization is only updated on map change
Combat log
It is possible to intercept this information flow. Thanks to Delta, Deathmax and Freesnöw for the following information.
The Logitech LCD SDK is available from http://gaming.logitech.com/sdk/LCDSDK_8.57.148.zip.
The default SDK searches the registry key HKEY_CLASSES_ROOT\HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{d0e790a5-01a7-49ae-ae0b-e986bdd0c21b}\ServerBinary for the path to the DLL to load.
The SDK contains the headers (LogitechLCDLib.h) which you would need to implement.
An example implementation exists, source: https://discord.com/channels/384735285197537290/384735523521953792/1114274342734417942