I know this is possible as I have done it before but I need a text note (pop up) to open when a tab file is opened. I know it's a simple one-line in the .tab file but just can't recall what the line is and can't find any info on it.
With the new 64 bit versions of MapInfo Pro, we have added a number of new events. One of these is the TableOpened event.
If you create a MapBasic application and sign up for this event, you can show a note, a print message or even use the new Notification window to show a message for any table opened.
Of course it does require that your tool is running.