Sub OnChecking(Sender: Object; Args: ITreeNodeCheckingEventArgs);
Begin
//set of operators;
End Sub OnChecking;
Sender - parameter that returns the component that has generated the event.
Args - parameter that enables the user to determine event parameters.
The OnChecking event occurs before the checkbox state of the element is changed.
This event is relevant, if the CheckBoxes property is set to True.
See also: