OnDblClick event occurs when the user double-clicks the left mouse button when the mouse pointer is over the control.
We use the OnDblClick event to respond to mouse double-clicks.
OnDblClick is an event handler of type System.Classes.TNotifyEvent.
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What is TNotifyEvent?
TNotifyEvent is used for events that do not require parameters.
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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