Using variable obtained using JavaScript in a widget

Hi again
I found this useful bit of JavaScript code which gets the active users name from an LMS and sets it as a variable within a Captivate course. [link below for anyone interested]
I've seen that variables can be used in Widgets but I can't get it to work.
I've set the variable as ActiveUserName ($$ActiveUserName$$ in drop down widget) but it shows as $$ActiveUserName$$ whether I'm testing it or on an LMS. Same result with an input box.
Has anyone tried this before or know of a way to do this please?
Thank you
As promised, link for JavaScript to pull active users name: Display the Student's Name From Your LMS Using Adobe Captivate 6.x - CaptivateDev.com

In Captivate 7 and 8, the Captivate defined user variable cpQuizInfoStudentName does this for you.
As far as the dropdown widget you cannot use a variable in the comma delimited list to display to the user. The result when the user makes a selection from the list can be assigned to a variable.

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