// wdm.h

PO_EFFECTIVE_POWER_MODE_CALLBACK PoEffectivePowerModeCallback;

VOID PoEffectivePowerModeCallback(
  PO_EFFECTIVE_POWER_MODE Mode,
  VOID *Context
)
{...}
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Windows Driver Kit DDI reference (nc-wdm-po_effective_power_mode_callback)

Description

The PO_EFFECTIVE_POWER_MODE_CALLBACK is the effective power mode callback.

Parameters

`Mode`

Indicates the effective power mode the system is running in. For more information, see PO_EFFECTIVE_POWER_MODE.

`Context`

User-specified opaque context. This context would have been passed in at registration in PoRegisterForEffectivePowerModeNotifications.

Remarks

Immediately after registration, this callback is invoked with the current value of the power setting. If the registration occurs while the power setting is changing, you may receive multiple callbacks. The last callback is the most recent update.

PO_EFFECTIVE_POWER_MODE_CALLBACK - NtDoc