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EC_ACTIVATE (Windows Embedded CE 6.0)

  • Article

1/6/2010

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
Note Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements
For more information, see Setting Up the Build Environment

See Also

Reference

Event Notification Codes