InfoPath Dev

I've been able to encode the files themselves, but the first portion of the attachment in Base64 appears to be specific to InfoPath. This is even documented in the URL below and I found some VB code, but I don't have the background to understand it. I have an example below. I just need to figure out what to encode for the "unknown" section. If I can figure out what to encode. I Used the decoder at https://www.browserling.com/tools/base64-decode to decode the "unknown" section below and it decodes to "U
". If I can figure out what this is supposed to be, I think I'll have everything I need. [standard] [unknown] [standard] [filename] [standard] x0lGQRQAAAABAAAAAAAA AFUBAAAJ AAAA dABlAHMAdAAuAHAAbgBn AAAA https://blogs.msdn.microsoft.com/infopath/2004/03/18/infopath-file-attachment-control/

 I'm wondering if the code sample here might be helpful: https://docs.microsoft.com/en-us/office/troubleshoot/office-developer/encode-and-decode-attachment-using-visual-c-in-infopath-2010

Unfortunately no. This is where not having a background in binary coding is a problem. I'd have to really understand that code in order to convert it to VBA, and I don't.

Are you using Visual Basic or C#? The sample is in C# - and if you don't have a language preference, you'll have an easier time finding C# samples....