Trigger Enter field behaviour through class for a control

I raised a query which now works as per David Zemens' instructions and BrakNicku guidance.

Problem is one of the events I want to use is Enter. Within the class, I don't get the option for this event. Is there is a way to add this to the class or trigger an Enter event for the control somehow?

I tried most of the events available within the class but none of them behave the way I need them to.

A quick background: I use Enter event to set help text for the field in focus. So every time a user enters a field, I have a help textbox that gets populated with help text.

I am unable to share the workbook.