VideoPortAssociateEventsWithDmaHandle function

The VideoPortAssociateEventsWithDmaHandle function is obsolete in Windows 2000 and later.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


PDMA VideoPortAssociateEventsWithDmaHandle(
  _In_    PVOID                 HwDeviceExtension,
  _Inout_ PVIDEO_REQUEST_PACKET pVrp,
  _In_    PVOID                 MappedUserEvent,
  _In_    PVOID                 DisplayDriverEvent
);

Parameters

HwDeviceExtension [in]

Pointer to the miniport driver's device extension.

pVrp [in, out]

Pointer to a VIDEO_REQUEST_PACKET.

MappedUserEvent [in]

Is reserved for system use.

DisplayDriverEvent [in]

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

Target platform

Version

Available in Windows 2000 and later versions of the Windows operating systems.

Header

Video.h (include Video.h)

Library

Videoprt.lib

DLL

Videoprt.sys

 

 

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