2 .NET classes in a COM Assembly

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YuriL - 19 Jan 2005 21:17 GMT

Hi,
I have a .NET assembly that I am trying to register as a COM dll. The
problem that I am faced with, is that this assembly has two classes, one of
which is a Windows Form. As of now, I have a ComRegisterFunction in both of
the classes, but I am getting a "DLLRegisterServer entry point was not found"
error when I try to register the dll as a COM server. Can anyone tell me how
to go about resolving this issue?
Thanks in advance!
Yuri

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Mattias Sj?gren - 19 Jan 2005 21:28 GMT

>but I am getting a "DLLRegisterServer entry point was not found"
>error when I try to register the dll as a COM server. Can anyone tell me how
>to go about resolving this issue?

Which registration tool are you using? Assemblies generally don't
export a DllRegisterServer entry point, so you can't use Regsvr32 or
similar tools. Instead use a tool like Regasm.

Mattias

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Mattias Sjögren [MVP] mattias @ mvps.org
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YuriL - 19 Jan 2005 22:17 GMT

when i only had one class in the assembly, I was able to register it by
including the [ComREgisterFunction] attribute before the class definition. I
belive I used Regsvr32 and it worked then - i'll have to double check. In
the mean time, I thought Regasm only adds things to the GAC - can I use it to
add my assembly to the registry - for use by COM? Also, not to get off my
original question, how do I do this for more than one class in the assembly?
Thanks,
Yuri

"Mattias Sjögren" wrote:

> >but I am getting a "DLLRegisterServer entry point was not found"
> >error when I try to register the dll as a COM server. Can anyone tell me how
[quoted text clipped - 5 lines]
>
> Mattias

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Mattias Sj?gren - 19 Jan 2005 22:49 GMT

>I thought Regasm only adds things to the GAC

It doesn't, you must be thinking of Gacutil.

>can I use it to add my assembly to the registry - for use by COM?

Yes, registering assebmlies with COM is all that Regasm does.

>Also, not to get off my
>original question, how do I do this for more than one class in the assembly?

The number of classes doesn't matter, you can include as many as you
like. I'm not sure if you can have multiple [ComRegisterFunction]
methods though, I've never tried that.

Mattias

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Mattias Sjögren [MVP] mattias @ mvps.org
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2 .NET classes in a COM Assembly

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