What's the purpose of noncreatable coclasses in IDL?

Posted by sharptooth on Stack Overflow See other posts from Stack Overflow or by sharptooth
Published on 2009-04-30T14:15:23Z Indexed on 2010/04/18 23:03 UTC
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What is the reason for declaring noncreatable coclasses like the following in IDL?

[
    uuid(uuidhere),
    noncreatable
]
coclass CoClass {
    [default] interface ICoClass;
};

I mean such class will not be registered to COM anyway. What's the reason to mention it in the IDL file and in the type library produced by compiling that IDL file?

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