I'm writing a Windows service using WinAPIs in C++. I'm curious if I can receive a notification when the system is switched from AC power (or plugged in) to DC power (or battery power) and vice versa?
Notification when power source switches from AC to DC and back?
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PowerSettingRegisterNotification to register a callback function when the power state changes. Then notification can queue up a call to GetSystemPowerStatus to get the AC/DC state.
There's also WM_POWERBROADCAST notification message.