In-Process COM

aberglas

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Sep 13, 2025, 4:16:36 AMSep 13

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Hello Govert,

I have people complaining that the dynamic COM does not meet their security requirements due to dynamic Prog-IDs. I love it because it avoids installers, my VBA loads it when necessary.

Is it possible to use in-process COM? Or to fix the Prog-IDs? Or some other work around?

Thanks for your excellent tool,

Anthony

Govert van Drimmelen

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Sep 13, 2025, 9:22:32 AMSep 13

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What are you using the COM for? The ribbon host, or objects exposed to VBA?

In some cases of you add Clair and progid attributes to your class, they will be used.

-Govert

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aberglas

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Sep 15, 2025, 8:20:37 AMSep 15

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Hello Govert,

I have the bulk of my application in VBA, and a small part in .Net for advanced UI in a window it creates. The only thing I need is to be able to Application.Run in both directions. I never directly access the Excel model from .Net, always via the VBA.

1. Can I use in-process COM

2. Should I even using COM for this?

(While Microsoft hates VBA, it is still be far the easiest environment to use with Excel. Their Javascript is a disaster!)

aberglas

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Sep 15, 2025, 8:20:38 AMSep 15

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Hello Govert,

Most of my application is in VBA, but some UI parts are in .Net. So I use COM to connect the two.

Is it not possible to use in-process COM, which I understand should not have any security concerns?

Anthony

On Saturday, September 13, 2025 at 11:22:32 PM UTC+10 Govert van Drimmelen wrote:

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