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介绍了Ｃｏｍｐｏｎｅｎｔ的概念、特征，并以Ｗｉｎｄｏｗｓ操作系统下的ＯＬＥＣｏｍｐｏｎｅｔ为例，从对象分析、对象结构，到对象构造，介绍了Ｃｏｍｐｏｎｅｎｔ在流域管理信息系统设计中的应用。
This paper introduces the concept and characteristics of Component, and takes OLEComponet under the Windows operating system as an example. It introduces the application of Component in the design of watershed management information system from object analysis, object structure to object construction.