Has anyone investigated how QueryStorm & ESharper deploy code with xlsx?

[Guillaume Dubé]

There are two Excel addins, and one that explicitely mentions using ExcelDna, that support shipping code with your workbook (xlsx), but requires their runtime install to work.

- https://querystorm.com/

- https://vlasovstudio.com/esharper/

Has anyone investigated how they bundle code with xlsx files?

It seems you can use xml parts (either as xml or as arbitrary files, I remember finding a stackoverflow post that mentions bundling an .ini file with it). Would they base64-encode C# code and compile it everytime when the workbook opens?

Or would you compile it beforehand and store it (as a dll?) in base64? Would that trigger some antivirus?