[This is preliminary documentation and subject to change.]
The PBT_APMRESUMEAUTOMATIC message is sent when the computer wakes up automatically to handle an event. An application will not generally respond to this message unless it is handling the event, because the user is not present. A window receives this message through the WM_POWERBROADCAST message.
dwData = (DWORD) lParam;
No return value.
If the system detects any user activity after sending PBT_APMRESUMEAUTOMATIC, it will send a PBT_APMRESUMESUSPEND message to let applications know they can resume full interaction with the user.
Windows NT: Requires version 5.0 or later.
Windows: Requires Windows 98.
Windows CE: Unsupported.
Header: Declared in pbt.h.
Power Management Overview, Power Management Messages, PBT_APMRESUMESUSPEND, WM_POWERBROADCAST