Instantly update a textbox in InfoPath 2007

Question

Hello. I'm trying to create an input form similar to a text message. I have a large textbox for the message, and I have a small textbox that is read-only that I want to show the character count.

I got this to work by setting the default value of the small textbook to the string length of the large textbox. This works correctly, but I would like to update the small textbox every time a character is entered into the large textbox, not every time I click off of the large textbox.

Any help would be much appreciated.

Answer 1

Note: It's been several months, so since I found an answer to this question, I'll post it to help anyone else looking for the same thing.

This is not possible using the default controls and properties in InfoPath 2007. In general, InfoPath can only respond to events when a field's value is finished being modified. It may be possible to do this with a custom ActiveX control.