How can I prevent user from pushing the close window button?

[keynet]

When the irrDevice is run(), it can closed by pushing the close window button on the upper right window(the X button)

But I want to get rid of this button so that user cannot close the window by pushing the button. I only want to let the window close when certain event happens.
But I cannot find any related function in irrDevice class. What should I do?

[hendu]

It's not exposed, so you either

a) hack irr
b) create your own window, and handle the events yourself