XF 1.1 Custom User Field - Referring member

[Robert F Schmitz]

How do I set up a custom user field so that when a registering person begins typing the member name that the options show up from which to select from? Is this possible with the custom fields? Thanks.

 

[Jake Bunce]

I think you might want this:

http://xenforo.com/community/resources/custom-user-field-callback-validate-value.379/