>In order to use grid's DblClick event you would have to put code in Column's text DblClick event like this.parent.parent.DblClick(this)

>In grid's DblClick you can do:
lparameter toTextBox && not really needed, but just in case
this.KeyValue = evaluate(this.ColumnHidden.ControlSource)

>where you grid would have a custom property KeyValue and your hidden column always would have some predefined name...

Perfect!
I did have to include the lparameter toTextBox. Any idea why?

Thank you,
Tom