IGraphVersion interface (strmif.h)

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The IGraphVersion interface is implemented on the Filter Graph Manager to provide a way for plug-in distributors and applications to know when the graph has changed. If the graph has changed, and the application or plug-in distributor has an interface on a particular filter or pin, it should requery the graph to see if its pointers are still valid, or if there are new ones it should use.

Inheritance

The IGraphVersion interface inherits from the IUnknown interface. IGraphVersion also has these types of members:

Methods

The IGraphVersion interface has these methods.

IGraphVersion::QueryVersion The QueryVersion method retrieves the current graph version number.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	strmif.h (include Dshow.h)