convert labels to geodatabase annotation

老师需要一个和ARCGIS里Convert Label To Annotate FeatureClass的功能。主要方便大数据量的图形转换。查了几天，毫无头绪，自己都忘记了在 AE开发帮助里进行搜索。到头来，得来不费功夫，还耗费我那么长时间。
当然，这些时间也让自己对Annotate这个东西有了更深的认识。
有IAnnotateLayer却好像没有IAnnotateFeatureclass这个东西。
最后在Arcgis中还有一个ConvertLabelsToAnnotationClass的类，真是气煞我也阿。
下面是一段将Labels转换位AnnotateLayer的代码
只是现在还不是很清楚Labels的具体含义和用法
private void ConvertLabelsToGDBAnnotationSingleLayer(IMap pMap, ILayer pLayer, bool featureLinked)
        {

            IConvertLabelsToAnnotation pConvertLabelsToAnnotation = new ConvertLabelsToAnnotationClass();
            ESRI.ArcGIS.esriSystem.ITrackCancel pTrackCancel = new CancelTrackerClass();
            //Change global level options for the conversion by sending in different parameters to the next line.
            pConvertLabelsToAnnotation.Initialize(pMap, esriAnnotationStorageType.esriDatabaseAnnotation,
                                                      esriLabelWhichFeatures.esriAllFeatures, true, pTrackCancel, null);

         
            IGeoFeatureLayer pGeoFeatureLayer = pLayer as IGeoFeatureLayer;
            if (pGeoFeatureLayer != null)
            {
                IFeatureClass pFeatureClass = pGeoFeatureLayer.FeatureClass;
                IDataset pDataset = pFeatureClass as IDataset;

                IFeatureWorkspace pFeatureWorkspace = pDataset.Workspace as IFeatureWorkspace;
                //Add the layer information to the converter object. Specify the parameters of the output annotation feature class here as well.
                try
                {
                    pConvertLabelsToAnnotation.AddFeatureLayer(pGeoFeatureLayer, pGeoFeatureLayer.Name + "_Anno",
                                                                  pFeatureWorkspace, pFeatureClass.FeatureDataset,
                                                                  featureLinked, false, false, true, true, "");
                }
                catch(Exception s)
                {
                    System.Windows.Forms.MessageBox.Show(s.Message);
                }
                //Do the conversion.
                pConvertLabelsToAnnotation.ConvertLabels();
                IEnumLayer pEnumLayer = pConvertLabelsToAnnotation.AnnoLayers;
                //Turn off labeling for the layer converted.
                pGeoFeatureLayer.DisplayAnnotation = false;

                //Add the result annotation layer to the map.
                pMap.AddLayers(pEnumLayer, true);

                //Refresh the map to update the display.
                IActiveView pActiveView = pMap as IActiveView;
                pActiveView.Refresh();
            }
        }