Creates an enumerator of all the connection points supported in the connectable object, one connection point per IID.
创建在可连接对象中支持的所有连接点的枚举数，每个IID一个连接点。
Creates an enumerator of all the connection points supported in the connectable object, one connection point per IID.
创建在可连接对象中支持的所有连接点的枚举数，每个IID一个连接点。
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