VC 判斷系統是否進入睡眠模式

 

LRESULT CALLBACK WindowProc(
  HWND hwnd,       // handle to window
  UINT uMsg,       // WM_POWER
  WPARAM wParam,   // power-management event
  LPARAM lParam    // function-specific data
);

WM_POWERBROADCAST消息，可以很據wParam參數來判定，判斷睡眠喚醒只需PBT_APMRESUMESUSPEND和PBT_APMSUSPEND事件

Event	Meaning
PBT_APMBATTERYLOW	Battery power is low.
PBT_APMOEMEVENT	OEM-defined event occurred.OEM定義的事件發生。
PBT_APMPOWERSTATUSCHANGE	Power status has changed.
PBT_APMQUERYSUSPEND	Request for permission to suspend.申請許可暫停。
PBT_APMQUERYSUSPENDFAILED	Suspension request denied.
PBT_APMRESUMEAUTOMATIC	Operation resuming automatically after event.
PBT_APMRESUMECRITICAL	Operation resuming after critical suspension.
PBT_APMRESUMESUSPEND	Operation resuming after suspension.
PBT_APMSUSPEND	System is suspending operation.