[求助]在GlobeControl中画圆出错

代码如下，<br>        Dim pCircArc As IConstructCircularArc<br>        pCircArc = New CircularArc<br>        dim R as Double =100<br>        pCircArc.ConstructCircle(startpoint,R,True)<br>        Dim pCircArc2 As ICircularArc<br>        pCircArc2 = pCircArc<br>        Dim pElement3 As IElement<br>        pElement3 = New CircleElement<br>        pElement3.Geometry = pCircArc2<br>运行时最后一句总是出错，说“值不在预期的范围内”，这是什么原因啊？谢谢！<br><br>