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Old October 8th, 2004, 08:57 AM
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Default COM component with C#


i have the following question:

Can I create a normal COM component with C#, which to register in Windows and use like, lets say COM component created with VB6, instantiating objects with CreateObject() in other Environments like VBA for example? Or add it as a Reference to VBA, or VB6 projects?

Because the .dll that i produced with .NET & C# is one i can add to another .NET project, but i can't add it to VBA as a reference neither can i register it in Windows, so i can use CreateObject().

Thanks in advance.

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Old October 11th, 2004, 01:21 PM
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I don't think this can be done.

Hal Levy
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Old October 11th, 2004, 11:58 PM
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Yes I think if you create a Component in C# it will require .NET Framework, so while running that component you need Framework without that you cannot run. So it is not possible I think.

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Old November 5th, 2004, 04:10 PM
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You can use a .NET assembly in COM. There is a setting in the project properties to register the assembly for COM interop. Of course, as mentioned, you must still have the .NET framework on the machine because the underlying code is still managed .NET code.

Property Properties -> Configuration Properties -> Build -> Register for COM Interop

You can perform this manually with the Assembly Registration Tool (Regasm.exe) found in the framework directory. Here's what MSDN says:

"The Assembly Registration tool reads the metadata within an assembly and adds the necessary entries to the registry, which allows COM clients to create .NET Framework classes transparently. Once a class is registered, any COM client can use it as though the class were a COM class."


Also, if that doesn't get you what you need, you can use the Type Library Exporter (Tlbexp.exe) found in the Visual Studio SDK to create a COM consumable type library. Take a look at MSDN for more details:

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