public Kriging()
{
   base.m_category = "GPTools";
   base.m_caption = "克吕金插值"; 
   base.m_message = "克吕金插值";
   base.m_toolTip = "克吕金插值";
   base.m_name = "Kriging";  
   try
   {
       string bitmapResourceName = GetType().Name + ".bmp";
       base.m_bitmap = new Bitmap(GetType(), bitmapResourceName);
   }
   catch (Exception ex)
   {
       System.Diagnostics.Trace.WriteLine(ex.Message, "Invalid Bitmap");
   }
}

public override void OnClick()
{
   Geoprocessor GP = new Geoprocessor();
   ESRI.ArcGIS.Analyst3DTools.Kriging pKriging = new Kriging();
   pKriging.in_point_features = @"E:\海平面气压.shp";
   pKriging.z_field = "pslv";
   pKriging.out_surface_raster = @"E:\\Krigingnew";
   pKriging.semiVariogram_props = "Spherical";
   GP.Execute(pKriging, null);
}

5）运行程序即可，在arcmap中调用试了一下，还是挺成功的。效果图如下：

Extraction工具也可以调用GP工具，代码如下：
Geoprocessor GP = new Geoprocessor();
ESRI.ArcGIS.SpatialAnalystTools.ExtractByMask pExtractByMask = new pExtractByMask();
pExtractByMask.in_raster = @"C:\map\grid\dqjsl";
pExtractByMask.in_mask_data = @"C:\map\XZJQ_ShiJi_R";
pExtractByMask.out_raster = @"C:\map\clipresult";
CommonClass.RunTool(GP, pExtractByMask, null);