Can a Windows 7 Service receive Power State notifications?

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I am writing a service for Windows 7, and because of the devices I'm interacting with, I need be aware of power state changes. The only notifications I've found on MSDN for these events come through WM_POWERBROADCAST.

Now, I already know I can't recieve Windows messages in a service. Is there there any other way to become aware of this state change? I need to know if a machine is hibernating, sleeping, what-have-you, so I can avoid unexpected behavior.

Posted 3-Oct-12 9:31am

centaSara

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Espen Harlinn · Accepted Answer · 2012-10-03T12:49:00

Solution 1

You need to use the RegisterServiceCtrlHandlerEx[^] when you register your HandlerEx[^] function.

When dwControl is SERVICE_CONTROL_POWEREVENT dwEventType provide the various PBT_ values you would receive in the wParam of a WM_POWERBROADCAST[^] event.

Best regards
Espen Harlinn

Posted 3-Oct-12 12:49pm

Espen Harlinn