DXGK_CONNECTION_CHANGE - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// d3dkmddi.h

typedef struct _DXGK_CONNECTION_CHANGE {
  ULONGLONG                      ConnectionChangeId;
  D3DDDI_VIDEO_PRESENT_TARGET_ID TargetId : 24;
  DXGK_CONNECTION_STATUS         ConnectionStatus : 4;
  UINT                           Reserved : 4;
  union {
    struct {
      D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY       LinkTargetType;
      DXGK_CONNECTION_MONITOR_CONNECT_FLAGS MonitorConnectFlags;
    } MonitorConnect;
    struct {
      D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY BaseTargetType;
      D3DDDI_VIDEO_PRESENT_TARGET_ID  NewTargetId;
    } TargetConnect;
    struct {
      D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY BaseTargetType;
      D3DDDI_VIDEO_PRESENT_TARGET_ID  NewTargetId;
    } TargetJoin;
  };
} DXGK_CONNECTION_CHANGE, *PDXGK_CONNECTION_CHANGE;
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Windows Driver Kit DDI reference (ns-d3dkmddi-_dxgk_connection_change)

DXGK_CONNECTION_CHANGE structure

Description

DXGK_CONNECTION_CHANGE describes the most recently updated status of the link for a target.

Members

ConnectionChangeId

The per target unique ID for the transition being reported. This value must be unique across all targets on the adapter and must be monotonically increasing for each change reported.

TargetId

The target ID for which the change is being reported. This target ID must have been reported to the OS before and must be in a state that supports the given change.

ConnectionStatus

A DXGK_CONNECTION_STATUS value that specifies the status of the connection. ConnectionStatus typically indicates the type of change, guiding which structure within the union member to use.

Reserved

Reserved for system use.

MonitorConnect

Describes the monitor that has been connected. This structure is used when ConnectionStatus is MonitorStatusConnected.

MonitorConnect.LinkTargetType

A D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY value that identifies the video output technology of the monitor that has been connected. The D3DKMDT_VOT_INTERNAL and D3DKMDT_VOT_MIRACAST values are not allowed.

MonitorConnect.MonitorConnectFlags

A DXGK_CONNECTION_MONITOR_CONNECT_FLAGS structure with flags for the connected monitor. This member is available starting with Windows 11 (WDDM 3.0).

TargetConnect

Describes the current target's connector. This structure is used when ConnectionStatus is TargetStatusConnected.

TargetConnect.BaseTargetType

A D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY value that identifies the video output technology of the current target's connector. As with MonitorConnect.LinkTargetType, the D3DKMDT_VOT_INTERNAL and D3DKMDT_VOT_MIRACAST values are not allowed.

TargetConnect.NewTargetId

The target ID for which the change is being reported. This target ID must have been reported to the OS before and must be in a state which supports the given change.

TargetJoin

Describes the joining target's connector. This structure is used when ConnectionStatus is TargetStatusJoined.

TargetJoin.BaseTargetType

A D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY value that identifies the video output technology of the connector of the new target. As with MonitorConnect.LinkTargetType, the D3DKMDT_VOT_INTERNAL and D3DKMDT_VOT_MIRACAST values are not allowed.

[!NOTE] The same BaseTargetType must be reported for all targets that are being joined to each other.

TargetJoin.NewTargetId

The target ID for which the change is being reported. This target ID must have been reported to the OS before and must be in a state which supports the given change.

See also

D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY

DXGK_SET_TIMING_PATH_INFO

DXGKARG_QUERYCONNECTIONCHANGE

DXGKDDI_QUERYCONNECTIONCHANGE

View the official Windows Driver Kit DDI reference

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