// video.h

typedef struct _VIDEO_CHILD_STATE {
  ULONG Id;
  ULONG State;
} VIDEO_CHILD_STATE, *PVIDEO_CHILD_STATE;
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Windows Driver Kit DDI reference (ns-video-_video_child_state)

_VIDEO_CHILD_STATE structure

Description

The VIDEO_CHILD_STATE structure contains information about a child device and the state into which it should be placed.

Members

`Id`

Specifies the ID for a particular child device, as given to it by the miniport driver. This value is the same as that returned in the UId parameter of the HwVidGetVideoChildDescriptor function.

`State`

Specifies the new state, on or off, for the child device. A value of one (1) indicates that the child device should be turned on; a value of zero (0) indicates that it should be turned off. One possible use for State is in hotkey switching from one display device to another.

Remarks

One member of the VIDEO_CHILD_STATE_CONFIGURATION structure is an array of VIDEO_CHILD_STATE structures. Each of these structures maintains state information for one of an adapter's child devices.

VIDEO_CHILD_STATE - NtDoc