Creating an OPC DA DCOM Server with C#|Classic OPC: DA, A&E, HDA, XML-DA, etc.|Forum|OPC Foundation

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Creating an OPC DA DCOM Server with C#
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Isaac Nadamas
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10/21/2025
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10/21/2025 - 08:47
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Hello everyone.

I'm new in OPC world and wanted to implement an application that exposes information that will be read by an OPC DA Client via DCOM.

The idea is that the values that are exposed in tags are values read from a database. That is, no data will be obtained from any external device.

My idea is to implement my application using C#, although if it were necessary to do it in another language, I could consider it.

As I have seen, I need the files opcda.dll, opcproxy.dll, opccomn.dll, opccomn_ps.dll and OpcEnum.exe to be able to do it.

I downloaded version 3.00.108 of OPC Core Components Redistributables from the OPC Foundation website, but it doesn't seem to include those files.

As I've been researching, I'd need version 2 of that package.

Could someone guide me on how to get that package or how to get the files I need?

Sorry if my question is very basic, but as I said before, I'm new in OPC world.

Thank you very much in advance.

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Randy Armstrong
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10/23/2025 - 11:21
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You should look at commercial SDKs since they will come with support.

There are old samples available to corporate members here:

https://opcfoundation.org/deve.....ls-classic

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