Is it possible to have Acrobat Javascript send a message to Excel VBA?

In short, what I am trying to do is to is to code a button in an Acrobat file that, when pressed, will run some Javascript within Acrobat -- say, app.alert("You have pressed me!"); and also somehow will call a routine in an Excel VBA file -- say msgbox "That's right, you pressed that button in Acrobat!"

Obviously it's trivial to do the first part. But the second part seems like it should be easy, but that it might be impossible.

Is there any way to send a message to VBA whenever a particular event (like a button-press) occurs in Acrobat?

(I can create a somewhat slow and clumsy work-around by setting up a global variable in Acrobat Javascript that updates whenever a button is clicked, and then continuously polling the value of that global variable from Excel using getJSObject. But in my particular project, this is undesirable and I am hoping that perhaps there is a cleaner and more direct way to accomplish the same thing.)