IMediaEventEx::GetNotifyFlags method (control.h)

Article
02/22/2024

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetNotifyFlags method determines whether event notifications are enabled.

Syntax

HRESULT GetNotifyFlags(
  [out] long *lplNoNotifyFlags
);

Parameters

[out] lplNoNotifyFlags

Pointer to a variable that receives one of the following values:

Value	Description
Zero	Event notifications are enabled.
AM_MEDIAEVENT_NONOTIFY	Event notifications are disabled.

Return value

Returns S_OK if successful, or E_POINTER if the lplNoNotifyFlags parameter is NULL.

Remarks

By default, the Filter Graph Manager posts event notifications for the application. To disable event notification, call the IMediaEventEx::SetNotifyFlags method with the value AM_MEDIAEVENT_NONOTIFY.

If event notifications are disabled, the handle returned by the IMediaEvent::GetEventHandle method is signaled at the end of each stream—that is, whenever the Filter Graph Manager receives an EC_COMPLETE event.

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	control.h (include Dshow.h)
Library	Strmiids.lib