RAD Studio VCL Reference
Classes.TNotifyEvent Type

TNotifyEvent is used for events that do not require parameters.

TNotifyEvent = procedure (Sender: TObject) of object;
(Sender: TObject) ( TNotifyEvent)();

The TNotifyEvent type is the type for events that have no event-specific parameters. These events simply notify the component that a specific event occurred. For example, OnClick, which is of type TNotifyEvent, notifies the control that a click event occurred on the control.  

The Sender parameter is the object whose event handler is called. For example, with the OnClick event of a button, the Sender parameter is the button component that is clicked. 


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