This event is triggered whenever a new slide image is rendered. This event is useful for situations where slide images need to be annotated. Because the TSlideShow control is a direct descendant of the TPaint control, it has a Canvas property that can be used to allow for direct drawing from within any event handlers attached to this event.
This event is triggered FramesPerSecond times per second, so it is very important that any code called from within any event handlers for this event is not time-consuming.