IMiniportWaveRTStreamNotification::UnregisterNotificationEvent method (portcls.h)

Article
02/22/2024

The UnregisterNotificationEvent method unregisters an event from DMA driven event notification.

Syntax

NTSTATUS UnregisterNotificationEvent(
  [in] PKEVENT NotificationEvent
);

Parameters

[in] NotificationEvent

A pointer to a previously registered kernel event (PKEVENT) to be unregistered from notification as DMA progresses.

Return value

UnregisterNotificationEvent returns a status value of STATUS_SUCCESS if the call was successful. Otherwise, the method returns an appropriate error status code.

Remarks

The port driver calls this method in response to a KSPROPERTY_RTAUDIO_UNREGISTER_NOTIFICATION_EVENT property request from a client. The port driver maps the user-mode event handle to a kernel event pointer and passes the pointer in with the NotificationEvent parameter.

Requirements

Requirement	Value
Minimum supported client	Available in Windows Vista and later Windows operating systems.
Target Platform	Universal
Header	portcls.h
IRQL	Passive level.