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IDistributorNotify::NotifyGraphChange

A version of this page is also available for

Windows Embedded CE 6.0 R3

4/8/2010

This method is called when the set of filters in the filter graph change or their connections change.

Syntax

HRESULT NotifyGraphChange( );

Parameters

None.

Return Value

Returns an HRESULT value that depends on the implementation. HRESULT can be one of the following standard constants, or other values not listed.

Value Description

E_FAIL

Failure.

E_POINTER

Null pointer argument.

E_INVALIDARG

Invalid argument.

E_NOTIMPL

Method is not supported.

S_OK or NOERROR

Success.

Remarks

This method is called whenever an FilterGraph::AddFilter, IFilterGraph::RemoveFilter, or IFilterGraph::ConnectDirect method is called or a method is called that will lead to one of these being called (such as IGraphBuilder::RenderFile).

Make sure you use Release on any held filters that have been removed at this point.

For performance reasons, PIDs might choose not to rescan the filters until the PIDs need the interfaces, because there might be several separate notifications sent. However, it is important to release cached interfaces immediately.

Requirements

Windows Embedded CE Windows CE 2.12 and later
Windows Mobile Windows Mobile Version 5.0 and later
Note Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements
For more information, see Setting Up the Build Environment, Version 2.12 requires DXPAK 1.0 or later