请教一个绘图的问题

<STRONG> 以下代码我在绘圆的时候,老是添加不上去,希望高手帮我看看,问题到达在哪里?多谢</STRONG><BR><STRONG>CMapXPoint point;<BR>  point.CreateDispatch(point.GetClsid());<BR>  CMapXFeature feature;<BR>  CMapXPoints points;<BR>  points.CreateDispatch(points.GetClsid());<BR>  CMapXRectangle rect;<BR>  rect.CreateDispatch(rect.GetClsid());<BR>  switch(ToolNum)<BR>  {<BR>  case CUSTOM_DRAW_LINE_TOOL:<BR>   {<BR>    points.AddXY(X1,Y1);<BR>    points.AddXY(X2,Y2);<BR>    COleVariant vtPoints;<BR>    vtPoints.vt=VT_DISPATCH;<BR>    vtPoints.pdispVal=points.m_lpDispatch;<BR>    vtPoints.pdispVal->AddRef();<BR>    feature=cFactory.CreateLine(vtPoints);<BR>    layer.AddFeature(feature);<BR>   }<BR>   break;<BR>  case CUSTOM_DRAW_CIRCLE_TOOL:<BR>   {<BR>    points.AddXY(X2,Y2);<BR>    COleVariant vtPoints;<BR>    vtPoints.vt=VT_DISPATCH;<BR>    vtPoints.pdispVal=points.m_lpDispatch;<BR>    vtPoints.pdispVal->AddRef();<BR>    feature=cFactory.CreateCircularRegion(1,points,Distance,1);<BR>    layer.AddFeature(feature);<BR>   }<BR>   break;<BR>  }</STRONG>

好失望哟,发了这么多天,连一个哥哥\姐姐来帮忙的都没有!!