WM_POWERBROADCAST - Win32 Programmer's Reference (win32.hlp)

Win32 Programmer's Reference

Index Commented Search About

Overview

Group

Quick Info

Windows NT
Yes
Win95
Yes
Win32s
No
Import Library
-
Header File
winuser.h
Unicode
No
Platform Notes
None

WM_POWERBROADCAST

The WM_POWERBROADCAST message is sent to an application to notify it of power-management events.

dwPowerEvent = (DWORD) wParam;
dwData = (DWORD) lParam;

Parameters
dwPowerEvent

Event notification message. This parameter can be one of the following values:

Value	Meaning
PBT_APMBATTERYLOW	Battery power is low.
PBT_APMOEMEVENT	OEM-defined event occurred.
PBT_APMPOWERSTATUSCHANGE	Power status has changed.
PBT_APMQUERYSUSPEND	Request for permission to suspend.
PBT_APMQUERYSUSPENDFAILED	Suspension request denied.
PBT_APMRESUMECRITICAL	Operation resuming after critical suspension.
PBT_APMRESUMESUSPEND	Operation resuming after suspension.
PBT_APMSUSPEND	System is suspending operation.

dwData

Function-specific data. For most messages, this parameter is reserved and not used.

However, if wParam is one of the resume notifications (PBT_APMRESUME*), the lParam parameter can specify the PBTF_APMRESUMEFROMFAILURE flag. This flag indicates that a suspend operation failed after the PBT_APMSUSPEND message was sent.

Return Values
Return TRUE to grant a request.

Return BROADCAST_QUERY_DENY to deny a request.

More Online Helps

Win32 Multimedia Programmer's Reference (mmedia.hlp)
OLE Programmer's Reference (ole.hlp)
Microsoft Windows Pen API Programmer's Reference (penapi.hlp)
Microsoft Windows Sockets 2 Reference (sock2.hlp)
Microsoft Windows Telephony API (TAPI) Programmer's Reference (tapi.hlp)
Unix Manual Pages

greatis just4fun network