EC_OPENING_FILE
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 graph is opening a file, or has finished opening a file.
Parameters
-
lParam1
-
TRUE if the graph is starting to open a file, or FALSE if the graph is no longer opening the file.
-
lParam2
-
Zero.
Default Action
None.
Remarks
A filter can send this event if it spends significant time opening a file. (For example, the file might be located on a network.) The application can use this event to adjust its user interface.
Requirements
| Requirement | Value |
|---|---|
| Header |
|