InfoPath Dev

I created a calcualted field which sums up data entered in a repeated section Text box.  Everything works as expected, but I would like to display an alert or a message when teh calculated field reached 100.  is this possible?

How about adding a calculated value control with static text, and hiding it when the value of that same formula is less than 100?

Thanks, the  solution  you provided works.  The only issue is there is no option to hide the control when I launch first time.  The static text is visible and the moment I enter the value and tab from the control, it hides.

 I'll try setting the default value to 0 and check

it worked after I set the default value to 0.

 Thanks for the solution.