In Windows, COM classes, interfaces and type libraries are listed by GUIDs in the registry.

So how about .net dll files?

If so, how to check it? For example, there is a class library file test.dll.

How can I check it in the registry?


Thanks

.NET DLL files aren't listed in the registry. They don't have to be registered like the COM interfaces and type libraries, therefore, you won't find them in the registry. If they exist on the disk, they exist.

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Okay. So can you please tell me how to check COM interfaces and type libraries in the registry?

This sounds like a different question. Your original question is "how to check .NET assemblies in the registry". The answer to your original question is: "You don't".

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Hello ardmore

Are you exposing .NET components to COM?
http://msdn.microsoft.com/en-us/library/zsfww439.aspx

If yes:

You should get a .tlb file accompanied with the .dll assembly. If you do not see the .tlb file, please run this command upon the .dll file:

tlbexp yourassembly.dll /out:outfile.tlb

After you get the tlb file, please open it using oleview. oleview is available in Windows SDK. You will see "coclass" in the viewer. They are the COM classes exported from your .NET component. By clicking on the coclass in oleview, you will see something like this:

[
uuid(18DF081C-E8AD-4283-A596-FA578C2EBDC3),
helpstring("AcroIEHelperShimObj Class")
]
coclass AcroIEHelperShimObj {
[default] interface IAcroIEHelperShimObj;
};

The GUID in uuid is the CLSID of the COM class. Next, you can navigate to the registry key of the COM class:

HKCR\CLSID\{18DF081C-E8AD-4283-A596-FA578C2EBDC3}



If no:

As David said, the dll is in your file system or GAC. It is not registered in the registry.


If you have any other questions, please feel free to post here.

Regards,
Jialiang Ge

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Thanks Ge,

I heard that regasm can be used to export an assembly to a typed library as well.
So what is the difference between "regasm" and "tlbexp" tools?
I mean in which circumstance a tool is selected?

Hello ardmore

regasm is used to register a .NET assembly into registry. After the registration, it can be used as a COM.
tlbexp is used to export tlb (type library) from a .NET assembly. It does not register the assembly.

Here are some reference materials about the two tools:
http://msdn.microsoft.com/en-us/library/tzat5yw6.aspx
http://msdn.microsoft.com/en-us/library/hfzzah2c.aspx
http://www.codeproject.com/KB/vb/Tlbexp_and_Regasm.aspx

If you have any other questions, please feel free to tell me.

Regards,
Jialiang Ge

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Please remember to mark the replies as answers if they help and unmark them if they provide no help.
Welcome to the All-In-One Code Framework! If you have any feedback, please tell us.