mf-event-source-characteristics-old-attribute.md

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Specifies the previous characteristics of the media source.	9779f350-60d5-4129-bada-0c4a58f93e6a	MF_EVENT_SOURCE_CHARACTERISTICS_OLD attribute (Mfapi.h)	reference	05/31/2018

MF_EVENT_SOURCE_CHARACTERISTICS_OLD attribute

Specifies the previous characteristics of the media source. The attribute data is a bitwise OR of flags from the MFMEDIASOURCE_CHARACTERISTICS enumeration.

Data type

UINT32

Remarks

This attribute is used with the MESourceCharacteristicsChanged event.

The GUID constant for this attribute is exported from mfuuid.lib.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Header	Mfapi.h

See also

Alphabetical List of Media Foundation Attributes

Event Attributes

IMFAttributes::GetUINT32

IMFAttributes::SetUINT32

IMFMediaSource