What's the Maximum length for a registered COM Class?

Question

When objects get added to the Windows Registry, they show up like so:

MyNamespace.MyType

I seem to remember running into issues with my namespaces and classnames being too long when trying to register them for COM. Is there a maximum length limitation in registering classes in Windows or COM+?

Answer 1

• Have no more than 39 characters.
• Contain no punctuation (including underscores) except one or more periods.
• Not start with a digit.
• Be different from the class name of any OLE 1 application, including the OLE 1 version of the same application, if there is one.*

source = MSDN