RAD Studio VCL Reference
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TEndUserHandledEvent is the type for event handlers that can optionally handle a task for an end user adapter.
TEndUserHandledEvent = procedure (Sender: TObject; var Handled: Boolean) of object;
(Sender: TObject; var Handled: Boolean) ( TEndUserHandledEvent)();
TEndUserHandledEvent is the type for event handlers that can perform some task that is otherwise handled by an end user adapter.
Sender is the end user adapter that will perform the task if the event handler does not do so.
Handled returns true if the event handler peformed the task. It returns false if the event handler did not perform the task. If Handled returns false, the end user adapter performs the task in its default manner.
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