ACX_EVENT_CALLBACKS - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// acxevents.h
typedef struct _ACX_EVENT_CALLBACKS {
ULONG Size;
PFN_ACX_EVENT_ENABLE EvtAcxEventEnable;
PFN_ACX_EVENT_DISABLE EvtAcxEventDisable;
PFN_ACX_OBJECT_PROCESS_EVENT_REQUEST EvtAcxEventProcessRequest;
} ACX_EVENT_CALLBACKS, *PACX_EVENT_CALLBACKS;
View the official Windows Driver Kit DDI referenceNo description available.
The ACX_EVENT_CALLBACKS structure identifies the driver callbacks for ACX event operations.
SizeThe length, in bytes, of this structure.
EvtAcxEventEnableThe EVT_ACX_EVENT_ENABLE callback.
EvtAcxEventDisableThe EVT_ACX_EVENT_DISABLE callback.
EvtAcxEventProcessRequestThe EVT_ACX_OBJECT_PROCESS_EVENT_REQUEST callback.
An ACXEVENT represents an asynchronous notification available at the driver level. Events can be added to ACXCIRCUITs, ACXSTREAMs, ACXELEMENTs and ACXPINs. Internally they are exposed as KS Events to upper layers. For more information about KS Events, see KS Events.
This example shows the use of ACX_EVENT_CALLBACKS.
ACX_EVENT_CALLBACKS eventCallbacks;
ACX_EVENT_CONFIG eventCfg;
//
// Add enable/disable callbacks for this element.
//
ACX_EVENT_CALLBACKS_INIT(&eventCallbacks);
eventCallbacks.EvtAcxEventEnable = &TestElement::EvtEventEnableCallback;
eventCallbacks.EvtAcxEventDisable = &TestElement::EvtEventDisableCallback;
ACX_EVENT_CONFIG_INIT(&eventCfg);
eventCfg.Set = &KSEVENTSETID_AudioControlChange;
eventCfg.Id = KSEVENT_CONTROL_CHANGE;
eventCfg.Callbacks = &eventCallbacks;
Minimum ACX version: 1.0
For more information about ACX versions, see ACX version overview.