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PBT_APMRESUMEAUTOMATIC event

Notifies applications that the system is resuming from sleep or hibernation. This event is delivered every time the system resumes and does not indicate whether a user is present.

A window receives this event through the WM_POWERBROADCAST message. The wParam and lParam parameters are set as described following.

C++


LRESULT 
CALLBACK 
WindowProc( HWND hwnd,      // handle to window
            UINT uMsg,      // WM_POWERBROADCAST
            WPARAM wParam,  // PBT_APMRESUMEAUTOMATIC
            LPARAM lParam); // zero

Parameters

hwnd

A handle to window.

uMsg

Value	Meaning
WM_POWERBROADCAST 536 (0x218)	Message identifier.

wParam

Value	Meaning
PBT_APMRESUMEAUTOMATIC 18 (0x12)	Event identifier.

lParam

Reserved; must be zero.

Return value

No return value.

Remarks

If the system detects any user activity after broadcasting PBT_APMRESUMEAUTOMATIC, it will broadcast a PBT_APMRESUMESUSPEND event to let applications know they can resume full interaction with the user.

Requirements

Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Header	WinUser.h (include Windows.h)

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