VC 判断系统是否进入睡眠模式

 

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，可以很据wParam参数来判定，判断睡眠唤醒只需PBT_APMRESUMESUSPEND和PBT_APMSUSPEND事件

EventMeaningPBT_APMBATTERYLOWBattery power is low.PBT_APMOEMEVENTOEM-defined event occurred.OEM定义的事件发生。PBT_APMPOWERSTATUSCHANGEPower status has changed.PBT_APMQUERYSUSPENDRequest for permission to suspend.申请许可暂停。PBT_APMQUERYSUSPENDFAILEDSuspension request denied.PBT_APMRESUMEAUTOMATICOperation resuming automatically after event.PBT_APMRESUMECRITICALOperation resuming after critical suspension.PBT_APMRESUMESUSPENDOperation resuming after suspension.PBT_APMSUSPENDSystem is suspending operation.