用c#怎么实现空间操作，比如Intersect

<P>空间操作返回的是Object对象，在VB中可以定义，可是在c#中好像不能定义MO下的Object，所以空间操作返回不了结果</P>

<P>请高手帮忙，谢谢</P><img src="images/post/smile/dvbbs/em12.gif" />

<P>这里一定要定义公共变量，而且还必须在定义时就new出来，不然画第二个Polygon的时候，shp1就没了</P><img src="images/post/smile/dvbbs/em03.gif" />

<P>已经解决，代码如下，呵呵</P>
<P>公共变量定义：</P>
<P>        private bool shape1=true;<BR>        private Polygon shp1 = new PolygonClass();<BR>        private Polygon shp2 = new PolygonClass();</P>
<P>在axMap1_MouseDownEvent中添加如下代码：<BR>Symbol sym = axMap1.TrackingLayer.get_Symbol(0);<BR>sym.SymbolType = SymbolTypeConstants.moFillSymbol;<BR>sym.Style = (short)MarkerStyleConstants.moCircleMarker;<BR>sym.Color = Convert.ToUInt32(ColorConstants.moOrange);<BR>if (shape1)<BR>{<BR>    shp1 = axMap1.TrackPolygon();<BR>    //axMap1.TrackingLayer.AddEvent(shp1, 0);<BR>    shape1 = false;<BR>}<BR>else<BR>{<BR>    shp2 = axMap1.TrackPolygon();<BR>    //axMap1.TrackingLayer.AddEvent(shp2, 0);<BR>    shape1 = true;<BR>    Object res = new Object();<BR>    res = shp1.Intersect(shp2,axMap1.Extent);<BR>    axMap1.TrackingLayer.AddEvent(res, 0);                 <BR>}</P><img src="images/post/smile/dvbbs/em08.gif" />