Catch signal

[Fernando Apesteguía <fernando apesteguia gmail com>]

Hi,

I've developed an app test to catch a delete_event for a window so I can
show some messages and then depending on the user answer close or not the
window.

My question is if there is a way to handle this signal from an external
application. This is.... The application B detects when the delete event has
been sent to the application A.

Is this possible?

Thanks!!!!