Motorola Mobile Workstation 520 Application Developer's Manual page 34

Parameters
dwData
Reserved; must be 0.
Return Values
No return value.
Remarks
Applications may receive this message at any time without a preceding
message.
PBT_APMSUSPEND
PBT_APMSUSPEND
The
PBT_APMSUSPEND
This message is typically sent when all applications and installable drivers have
returned to a previous
TRUE
receives this message through the
dwData = (DWORD) lParam;
Parameters
dwData
Reserved; must be 0.
Return Values
No return value.
Remarks
An application should process this message by completing all tasks necessary to
save data. This message may also be sent, without a prior
PBT_APMQUERYSUSPEND
SetSystemPowerState function to force suspension.
Windows NT includes the APM2.0 utility, which adds APM support to
the Windows NT system.
See Microsoft MSDN for additional information about Power
Note
Management events.
is sent immediately before the computer is suspended.
PBT_APMQUERYSUSPEND
WM_POWERBROADCAST
message, if an application or device driver uses the
Power Management
message. A window
message.
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