EMPNotify is the type of event handlers that respond when the user interacts with a TMediaPlayer component.
EMPNotify = procedure (Sender: TObject; Button: TMPBtnType; var DoDefault: Boolean) of object;
(Sender: TObject; Button: TMPBtnType; var DoDefault: Boolean) ( EMPNotify)();
Sender is the TMediaPlayer component whose button was clicked.
Button indicates the button that was clicked. It can be one of the following values: btBack, btEject, btNext, btPause, btPlay, btPrev, btRecord, btStep, or btStop.
DoDefault returns an indication of whether the media player should make its default response after the event handler exits.
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