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PUNREGISTER_NOTIFICATION_EVENT callback function (hdaudio.h)

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The UnregisterNotificationEvent routine deletes the registration of an event that was previously registered by a call to RegisterNotificationEvent.

The function pointer type for an UnregisterNotificationEvent routine is defined as follows.

Syntax

PUNREGISTER_NOTIFICATION_EVENT PunregisterNotificationEvent;

NTSTATUS PunregisterNotificationEvent(
  [in] PVOID _context,
  [in] HANDLE Handle,
  [in] PKEVENT NotificationEvent
)
{...}

Parameters

[in] _context

Specifies the context value from the Context member of the HDAUDIO_BUS_INTERFACE_V2 structure.

[in] Handle

Handle that identifies the DMA engine. This handle value was obtained from a previous call to AllocateCaptureDmaEngine or AllocateRenderDmaEngine.

[in] NotificationEvent

A pointer to a kernel event that was previously registered for DMA progress notification with a call to RegisterNotificationEvent.

Return value

UnregisterNotificationEvent returns STATUS_SUCCESS if the call successfully unregisters the notification event. Otherwise, the routine returns STATUS_INVALID_PARAMETER to indicate that the specified callback routine and context are not valid.

Requirements

Requirement Value
Minimum supported client Available in Windows Vista and later versions of Windows.
Target Platform Desktop
Header hdaudio.h (include Hdaudio.h)
IRQL PASSIVE_LEVEL.

See also

AllocateCaptureDmaEngine

AllocateRenderDmaEngine

HDAUDIO_BUS_INTERFACE_V2

RegisterNotificationEvent  

hdaudio.h