[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'Controls' (#lcl)

TControl.AddHandlerOnVisibleChanging

Adds an OnVisibleChanging handler.

Declaration

Source position: controls.pp line 1561

public procedure TControl.AddHandlerOnVisibleChanging(

  const OnVisibleChangingEvent: TNotifyEvent;

  AsFirst: Boolean = False

);