Dell monitor event-based API

Hello everyone,

I got a new UltraSharp monitor and connect it via USB-C to my MacBook. When I power off the monitor using the physical button, external hard drives are ejected (because they are connected to the monitor and the usb-c connection to the macbook is closed). Is there a event-driven API to get a notification (e.g. "onPowerSavingModeIniciati"). I could only find the Dell monitor SDK.

Thanks for your help.