请问如何生成VORONOI MAP

<P>Geoprocessor gp = new Geoprocessor();<BR>gp.OverwriteOutput = true;<BR>           <BR>ESRI.ArcGIS.AnalysisTools.CreateThiessenPolygons CreateTh = new ESRI.ArcGIS.AnalysisTools.CreateThiessenPolygons("c:\\Points.shp", "c:\\ye.shp");</P>
<P>gp.Execute(CreateTh, null); </P>
<P>我用以上代码 不能生成ThiessenPolygons 请高手解答 非常感谢<BR></P>