EC_ACTIVATE
A version of this page is also available for
4/8/2010
An audio or video renderer is losing or gaining activation.
The audio or video renderer sends this event notification.
Parameters
- lParam1
Set to 1 if activation gained, or 0 if lost.
- lParam2
Pointer to the IBaseFilter interface that is sending the event notification.
Remarks
This event notification is not sent to the application.
This notification is used for sound-follows-focus and full-screen switching.
To interact in full-screen protocols, a video renderer should send an EC_ACTIVATE notification whenever its window is either activated or deactivated.
In other words, an EC_ACTIVATE notification should be sent for each WM_ACTIVATEAPP message received by a renderer.
For information on how to use this event code, see CBaseFilter::NotifyEvent.
Requirements
| Windows Embedded CE | Windows CE 2.12 and later |
| Windows Mobile | Pocket PC for Windows Mobile Version 5.0 and later, Smartphone for 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 |