![](dotnetdiagramimages/MESCIUS_ActiveReports_Core_Rendering_GrapeCity_DataVisualization_Chart__RadialTrackArea.png)
'宣言
Public Class _RadialTrackArea Inherits _TrackArea Implements ITracker
public class _RadialTrackArea : _TrackArea, ITracker
System.Object
GrapeCity.DataVisualization.Chart._Tracker
GrapeCity.DataVisualization.Chart._TrackArea
GrapeCity.DataVisualization.Chart._RadialTrackArea