I don't think the form can fire any suitable events by clicking on controls - even if you make the control background transparent. OnCurrent would work, but as I said, it's not suitable. If this is a continuous form, you could add a button but it would appear on every record. At least it could make use of any of the fields in the particular record. I've also tried this in the past by placing text boxes behind a row of transparent controls and it doesn't work either, but it does raise the text box to the top of the stack if it gets the focus, which is completely useless.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.