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新的接口
官方真是惜字如金~
IShapeConstructor
Available with ArcGIS Desktop.
Indicator interface for tools that utilize shape constructors. Available with ArcGIS Desktop. Editor framework customizations
官方解释
IEditTemplate、IEditTemplateFactory受IEditor3控制，生成的模版（Templates）会保存在mxd或者lyr文件中
Templates are created using the IEditTemplate and IEditTemplateFactory interfaces and managed through the IEditor3 interface. The current or selected template can be obtained from the IEditor3::Currenttemplate method returning IEditTemplate. The symbology for the template is determined by the value of the field used to render the layer in the map and is handled internally. Templates are stored within the map document and within a layer file if the layer is exported as such.
捕捉
IPointSnapper
ISnappingResult
官方言之甚少，只有一句“Available with ArcGIS Engine.”
倒是也有提示
This interface provides access to information regarding the last call to Snapping,
including the location of the point location that satisfied the snap request,
and information about the layer and snapping type associated with that location. A reference to a snapping result is returned from IPointSnapper.Snap().
If not valid snap candidates were found during execution of the Snap method, a null ISnapResult is returned.
As a developer you should anticipate this and utilize a null pointer check before querying information returned.
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原文地址：http://www.cnblogs.com/feedback/p/4676389.html
