1.涉及到的消息和API消息：WM_POWERBROADCAST、PBT_APMPOWERSTATUSCHANGEAPI:SYSTEM_POWER_STATUS ps;GetSystemPowerStatus(&ps);2.说明PBT_APMPOWERSTATUSCHANGE这个消息，只有在插入电源和拔掉电源时才会响应，所以如果想要实时检测笔记本电池电量，必须设置一个定时检测的定时器来检测才能实现

3.实现代码1）程序开始处添加定时器：#define BatteryPowerTimerID 1 //检测笔记本电池电量定时器 SetTimer(BatteryPowerTimerID, 30000, NULL);
void CbatteryDlg::OnTimer(UINT_PTR nIDEvent) { // TODO: Add your message handler code here and/or call default switch (nIDEvent) { case BatteryPowerTimerID: { CheckBatteryStatus(); } break; default: break; } CDialogEx::OnTimer(nIDEvent); }void CbatteryDlg::CheckBatteryStatus() { SYSTEM_POWER_STATUS ps; GetSystemPowerStatus(&ps); int nLife = 0; //是否使用交流电源 if ( ps.ACLineStatus != AC_LINE_ONLINE ) { if ( ps.BatteryFlag != BATTERY_FLAG_NO_BATTERY && ps.BatteryFlag != BATTERY_FLAG_UNKNOWN ) { nLife = ps.BatteryLifePercent; if ( nLife <= 10 ) { AfxMessageBox(_T("电量低于10%")); } } } else { AfxMessageBox(_T("有电源供电")); } } 2）响应消息#define WM_POWER_STATUS_MSG (WM_USER+1001)
LRESULT CbatteryDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) { // TODO: Add your specialized code here and/or call the base class switch (message) { case WM_POWERBROADCAST: { switch(wParam) { case PBT_APMPOWERSTATUSCHANGE://电源状态 { SendMessage(WM_POWER_STATUS_MSG, 0, 0); } break; } } break; } return CDialogEx::WindowProc(message, wParam, lParam); }ON_MESSAGE(WM_POWER_STATUS_MSG, &CbatteryDlg::OnPowerStatus)LRESULT CbatteryDlg::OnPowerStatus( WPARAM wParam, LPARAM lParam ) { CheckBatteryStatus(); return 0; }Demo下载：点击下载