TTMSFNCWidgetArrowBeforeDrawArrowEvent Event Type

Fires before the arrow shape is drawn, allowing the handler to suppress or replace the default arrow rendering.

API unit family: TMSFNCWidgetArrow

Parameters

Name	Description
Sender	Control that raises the event.
AGraphics	Graphics surface used for drawing.
ARect	Square area in which the arrow is drawn.
RadianRotation	Rotation of the arrow in radians, derived from the current value.
AAllow	Set to False to skip both the default arrow and the matching after-draw notification.
ADefaultDraw	Set to False to suppress the built-in arrow drawing while still raising the after-draw notification.