TTMSFNCTrackBar.OnBeforeDrawThumb Event

Occurs before the thumb is drawn.

API unit family: TMSFNCTrackBar Declaring type: TTMSFNCTrackBar Inherited from: TTMSFNCCustomTrackBar

Syntax

FMX.TMSFNCTrackBar.hppPascalC++

OnBeforeDrawThumb: TTMSFNCCustomTrackBarBeforeDrawThumbEvent;

__property TTMSFNCCustomTrackBarBeforeDrawThumbEvent OnBeforeDrawThumb = {read=FOnBeforeDrawThumb, write=FOnBeforeDrawThumb};