I think RichEdit has been my favorite thing I've ever discovered on AutoIt lol. In my quest to add in more html tags to my _StringToRichEditArray I needed a way to do href! There was an example I found that I followed but it didn't format correctly and didn't work 100% but it gave me a good base. Think I'll tackle inserting an image next, not looking forward to that. If anyone has an idea on how to do it let me know.
Known issues (these will cause the hyperlink to lose the +li attribute after the RichEdit is updated):
The hyperlink and friendly text are appended/inserted (directly adjacent to a non whitespace) but the hyperlink is not a valid hyperlink.
Changing the char color for the control causes the hyperlink to lose it's hyperlink color (the light blue).
Fix for Issue 1:
Use the full URL for the hyperlink (https://www.autoitscript.com/site/ instead of www.autoitscript.com/site)
Use any hyperlink with any friendly text that does not have www at the beginning (Hyperlink: www.google.com, Friendly Text: google.com)
Use any hyperlink with any, or no, friendly text, but have a whitespace to the left of the hyperlink.
Fix for Issue 2:
I have no fix.
Updated RichEdit Hyperlink.au3
Demo
Original Post, outdated: Had a problem with inserting/appending hyperlinks that pointed to the local computer. (C:\Windows\)