IMediaEventEx::SetNotifyFlags 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 SetNotifyFlags method enables or disables event notifications.

Syntax

HRESULT SetNotifyFlags(
  [in] long lNoNotifyFlags
);

Parameters

[in] lNoNotifyFlags

Value indicating whether to enable or disable event notifications. Must be one of the following values:

Value	Description
Zero	Enable event notifications.
AM_MEDIAEVENT_NONOTIFY	Disable event notifications.

Return value

Returns S_OK if successful, or E_INVALIDARG if the lNoNotifyFlags parameter is invalid.

Remarks

By default, the Filter Graph Manager posts event notifications for the application. If the lNoNotifyFlags parameter is AM_MEDIAEVENT_NONOTIFY, the Filter Graph Manager clears any pending event notifications from the queue, and does not post any new ones.

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