VideoPortAssociateEventsWithDmaHandle function (video.h)

Artikel
02/22/2024

The VideoPortAssociateEventsWithDmaHandle function is obsolete in Windows 2000 and later.

VideoPortAssociateEventsWithDmaHandle associates an event, which is shared by the video display driver and the video miniport driver, with a DMA handle.

Syntax

VIDEOPORT_DEPRECATED VIDEOPORT_API PDMA VideoPortAssociateEventsWithDmaHandle(
  [in]      IN PVOID                     HwDeviceExtension,
  [in, out] IN OUT PVIDEO_REQUEST_PACKET pVrp,
  [in]      IN PVOID                     MappedUserEvent,
  [in]      IN PVOID                     DisplayDriverEvent
);

Parameters

[in] HwDeviceExtension

Pointer to the miniport driver's device extension.

[in, out] pVrp

Pointer to a VIDEO_REQUEST_PACKET.

[in] MappedUserEvent

Is reserved for system use.

[in] DisplayDriverEvent

Is reserved for system use.

Return value

VideoPortAssociateEventsWithDmaHandle always returns NULL.

Remarks

See Bus-Master DMA in Video Miniport Drivers for information about packet-based and common-buffer DMA transfers.

Requirements

Requirement	Value
Minimum supported client	Available in Windows 2000 and later versions of the Windows operating systems.
Target Platform	Desktop
Header	video.h (include Video.h)
Library	Videoprt.lib
DLL	Videoprt.sys

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