Automation与Createable by type ID有何区别

[beturing]

使用Mfc编写com,用ClassWizard生成一个类，从CCmdTarget继承来，Automation里有None、Automation与Createable by type ID三个选项。有什么区别?

[proe]

If your vb client wants to create a instance of the class, you have to choose Createable BY Type ID and type its progID on the right filed.

Automation, if you select it, the class will support automation.

[mul]

Createable by type ID
1.类工厂支持
2.把IID等写入ODL

选择Automation,再手工添加以上内容可与选择Createable by type ID同样效果