How to track when home button is pressed?

[Sean Moakes]

I am making a Unity application for the Focus 3 that pauses and shows a pause menu if the menu button on the left controller is pressed and I want to make it so that the app pauses when the vive/home button on the right controller is pressed.
I have tried the usual route of using OnApplicationFocus and was wondering if anyone had any ideas as to how I might go about this?

Thank you.

[Tony PH Lin]

The vive/home button on the right controller is reserved for Focus 3 system usage, so we tend not to open for content development.

Thanks.