GLLINKSTATUS

GLLINKSTATUS is a system-defined structure in Microsoft Windows that provides information about the status of a graphics adapter's link. This structure is typically used by graphics drivers and related system components to communicate the operational state of the connection between the graphics processing unit (GPU) and the display output.

The GLLINKSTATUS structure can contain various fields, depending on the specific graphics hardware and driver implementation. Common information conveyed by this structure includes the status of the display connection (e.g., connected, disconnected, or not detected), the resolution and refresh rate of the active display mode, and potentially details about the type of connection being used, such as DisplayPort or HDMI.

The primary purpose of GLLINKSTATUS is to enable the operating system and applications to accurately determine what displays are available and their current configuration. This allows for proper display management, including extending the desktop across multiple monitors, adjusting display settings, and ensuring that graphics are rendered correctly on the active screens. Graphics drivers utilize this information to report changes in display status to the Windows Display Driver Model (WDDM) and other relevant system services. Developers working with graphics APIs or display management tools might interact with GLLINKSTATUS indirectly through higher-level Windows functions.