// usbpmapi.h

typedef struct _USBPM_EVENT_CALLBACK_PARAMS {
  USBPM_EVENT_TYPE EventType;
  union {
    struct {
      ULONG AccessGranted;
    } PolicyManagerArrival;
    struct {
      USBPM_HUB HubHandle;
    } HubArrivalRemoval;
    struct {
      USBPM_CONNECTOR ConnectorHandle;
    } ConnectorStateChange;
  } EventData;
  PVOID            Context;
} USBPM_EVENT_CALLBACK_PARAMS, *PUSBPM_EVENT_CALLBACK_PARAMS;
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Windows Driver Kit DDI reference (ns-usbpmapi-_usbpm_event_callback_params)

_USBPM_EVENT_CALLBACK_PARAMS structure

Description

Contains the details of the events related to changes in policy manager arrival/removal, hub arrival/removal or connector state change. This structure is used in the EVT_USBPM_EVENT_CALLBACK callback function.

Members

`EventType`

A USBPM_EVENT_TYPE-type value that indicates the type of event.

`EventData`

A union that contains the event-specific data. The client driver should set the event data in the inner structure related to the event.

`EventData.PolicyManagerArrival`

Data about the Policy Manager arrival event.

`EventData.PolicyManagerArrival.AccessGranted`

`EventData.HubArrivalRemoval`

Data about the hub arrival or removal event.

`EventData.HubArrivalRemoval.HubHandle`

The handle to the connector hub.

`EventData.ConnectorStateChange`

Data about the connector state change event.

`EventData.ConnectorStateChange.ConnectorHandle`

The handle to the connector.

`Context`

The context which is provided by the client driver in a previous call to UsbPm_Register.

USBPM_EVENT_CALLBACK_PARAMS - NtDoc