The Power Manager builds on the standard Windows CE power architecture. Regardless of whether they are aware of Power Manager, stream device drivers will be notified through XXX_PowerUp (Device Manager) and XXX_PowerDown (Device Manager) when the system suspends and resumes. The following table shows the APIs related to power management.
| Function | Description |
|---|---|
| GetSystemPowerStatusEx2 | Retrieves battery status information. |
| PowerPolicyNotify | Notifies the power manager of the events that are necessary in order to implement a power policy created by an OEM. |
| OEMIdle | Called by the kernel to place the microprocessor in the idle state when there are no threads ready to run. |
| OEMPowerOff | Invoked when the OFF button is pressed or the Graphics, Windowing, and Events Subsystem (GWES) times out on its power-off timer. It is responsible for any final power-off state and putting the microprocessor into suspend mode. |
| XXX_PowerDown (Device Manager) | Suspends power to the device. It is useful only with devices that can be shut off under software control. |
| XXX_PowerUp (Device Manager) | Restores power to a device. |
See Also
Power Management Architecture | How to Add Power Management to a Device Driver
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