Notification Interface
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4/8/2010
Power Manager provides a set of functions that allow applications to receive notifications of power-related events and to participate in system power status change decisions. These functions are shown in the following table.
| Function | Description |
|---|---|
Requests that Power Manager send notification of power events. |
|
Cancels a notification request made with RequestPowerNotifications. |
Notifications are delivered through message queues. To use notifications, applications must create a message queue and pass its handle to Power Manager with the RequestPowerNotifications function. Applications generally create a thread that waits for the message queue.
Power Manager defines the notifications shown in the following table.
| Notification | Description |
|---|---|
PBT_RESUME |
Generated when the system resumes from a suspended state. |
PBT_POWERSTATUSCHANGE |
Generated when the system transitions to or from AC power. |
PBT_TRANSITION |
Generated when Power Manager is performing a system power state change. |
PBT_POWERINFOCHANGE |
Generated when battery information or AC line status changes. |