Thank you for the very useful post, I made it. It works.
I am testing it , the problem I get is an annoying warning, although I reach my goal,
the below warning message pops up after every click or change field focus.
What have I done wrong ?
The expression on Current you entered as the event property setting produced the following error.
The object doesn't contain the Automation object <<field2>>
The expression may not result in the name of a macro, the name of a user-defined function or [event procedure]
Help
This error occurs when an event has failed to run because the location of the logic for the event cannot be evaluated. For example, if the OnOpen property of a form is set to =[Field], this error occurs because a macro or event name is expected to run when the event occurs.