Access Level for Enum

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VB

.NET

I have a DLL project that has several classes and a global module. The global module has a Public Enum. I have a Public Function in a class and I want the Public Enum to be a parameter in the function. But I get a blue squiggly error:

'MyEnumNameInstance' cannot expose type '[Global}.MyEnumName' outside the project through class 'MyClassName'.

At the point in the code where I declare my function:

Public Function MyFunction(ByVal MyEnumNameInstance As MyEnumName, _
                           ByVal otherParm As Integer) As Boolean
    'Function does stuff then returns boolean
End Function

Isn't that what "Public" is supposed to do? How can I make an enumeration MORE public than just declaring it Public? I don't really want to copy the enumeration across every class in my DLL. The whole point is to have one definition of the enumeration and it is used everywhere. Is there a keyword that can make it public even outside the dll?