property OnUserChange: TNotifyEvent;
OnUserChange is called when control is changed by user, as reaction to mouse events. It is not called then the control is changed due to some internal program activity. This event is called after OnChange.
This event is never called by TArrowBar itself, but it is shared by descendants TCustomRangeBar and TCustomGaugeBar.
TArrowBar, OnChange, TCustomGaugeBar, TCustomRangeBar
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