GlobeControl如何控制注记在什么范围内显示？

IAnnotateMap2 annMap = new MaplexAnnotateMapClass(); 

map.AnnotationEngine = annMap as IAnnotateMap; 



IEnumLayer layers = map.Layers; 

ILayer layer = layers.Next(); 

IFeatureLayer2 fealy = layer as IFeatureLayer2; 



IGeoFeatureLayer geoFeatureL = fealy as IGeoFeatureLayer; 

IAnnotateLayerPropertiesCollection annotateLPC = geoFeatureL.AnnotationProperties; 



annotateLPC.Clear(); 

geoFeatureL.DisplayAnnotation = true; 



IAnnotateLayerProperties annotateLP = new MaplexLabelEngineLayerPropertiesClass(); 



annotateLP.AnnotationMaximumScale = 5000000; 

annotateLP.AnnotationMinimumScale = 20000000; 



annotateLPC.Add(annotateLP); 



IActiveView activeview = map as IActiveView 

activeview.Refresh();