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VideoPortCreateEvent function (video.h)

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The VideoPortCreateEvent function creates an event object.

Syntax

VIDEOPORT_API VP_STATUS VideoPortCreateEvent(
  [in]  IN PVOID   HwDeviceExtension,
  [in]  IN ULONG   EventFlag,
  [in]  IN PVOID   Unused,
  [out] OUT PEVENT *ppEvent
);

Parameters

[in] HwDeviceExtension

Pointer to the miniport driver's device extension.

[in] EventFlag

Specifies the event type and initial event state. This can be an ORed combination of the following flags:

Flag Meaning
INITIAL_EVENT_SIGNALED Set this flag to indicate the signaled state for the event object. Otherwise, the initial state of the event is nonsignaled.
NOTIFICATION_EVENT Set this flag to create a notification event. If this flag is not set, a synchronization event is created.

[in] Unused

Is currently ignored by the video port driver and must be set to NULL.

[out] ppEvent

Pointer to the memory location at which a pointer to the event object will be returned.

Return value

VideoPortCreateEvent returns NO_ERROR if the event object is successfully created.

Remarks

When a synchronization event is set to the signaled state, a single thread that was waiting for the signaled state is released (its dispatch state transitions from waiting to ready, standby, or running), and the event is automatically reset to the nonsignaled state.

When a notification event is set to the signaled state, all threads that were waiting for the signaled state are released, and the event remains in the signaled state until it is explicitly reset to the nonsignaled state.

Requirements

Requirement Value
Minimum supported client Available in Windows XP and later versions of the Windows operating systems.
Target Platform Desktop
Header video.h (include Video.h)
Library Videoprt.lib
DLL Videoprt.sys
IRQL PASSIVE_LEVEL

See also

VideoPortDeleteEvent