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EC_ACTIVATE (Compact 2013)

  • Article

3/26/2014

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

Header

dshow.h

Library

Strmiids.lib

See Also

Reference

Event Notification Codes