The PDA has returned from the powered down state
Parameters passed to GPSNOTIFYPROC:
lParam1
Not used.
lParam2
A pointer to a NULL-terminated text status message: "Power has been turned on". On Windows CE platforms this will be a Unicode buffer; on all other platforms it is an ASCII buffer.
lParam3
Contains the user-defined parameter lUserParam passed to the
GpsSetNotificationCallback function.