EC_DVD_BUTTON_CHANGE
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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.]
Signals that the number of DVD menu buttons has changed, or that the button selection has changed.
Parameters
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lParam1
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DWORD value indicating the number of available buttons.
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lParam2
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DWORD value indicating the currently selected button number. Selected button number zero implies that no button is selected.
Remarks
Button numbers range from 1 to 36.
The currently selected button can change automatically with a navigation command authored on the disc as well as through application control by using IDvdControl2 interface.
This event can signal any of the available button numbers. These numbers do not always correspond to button numbers used for IDvdControl2::SelectAndActivateButton because that method can activate only a subset of buttons.
This event is raised in all domains.
Requirements
| Requirement | Value |
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| Header |
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