Is there a value change event for the label/caption of an xcontrol?

[Synaesthesiac]

I am creating an XControl in which I use the label/caption text in a special way.  I know that I can access the value of the caption/label inside the Facade VI easily, however, I need to be able to respond only when the caption/label text is changed.  It seems that a change to the caption/label text ought to trigger an event in the Facade VI, but as far as I can tell this does not happen.  My only solution is to toss that code in to a mouseover event or something and bank on the likelihood of a user mousing over the control after changing the caption/label, but that's certainly a hack.

[TCPlomp]

Well the label can only be changed when the VI is idle, so just read the label when the Application.state event is triggered.

Ton