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Yeah, the runtime component is an ExcelDNA addin. The IDE component is a VSTO addin. Since VSTO doesn't allow defining custom functions I switched to using ExcelDNA for the runtime.

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What did you use to write the installer, and how do you determine if the targeted version of Excel is 32 or 64 bit?

I've built an Excel-DNA based Add-in (https://www.excelpricefeed.com/) and distribute it via an installer built using Advanced Installer. It works well, the only real pain point is the the user has to find out which version of Excel they have installed in order to choose the correct download (32 or 64 bit).

See https://github.com/xlladdins/xlladdin/blob/master/ThisAddIn....

I use Wix for the installer. Can't remember how I dealt with that particular issue, but ping me at antonio [at] querystorm.com in a day or two, if you're interested, and I'll have a look at how exactly I dealt with it.

Please consider acknowledging that on your website.

I would love to but I'm a bit scared to fiddle with the post now while it's trending. I think it's mentioned in a few places on the website, but not in this blog post. I do also use a bunch of other libraries, but yeah, ExcelDNA is one of the critical ones so mentioning it would be in order.

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