关于BREW里面的电池条有关问题？如何才能知道这个电池条是否处于关闭或者打开的状态

HTC_SetAnn(pMe->a.m_pIDisplay,0);
            {
              AEERect rc = {0};
              ISHELL_GetDeviceInfo(pMe->a.m_pIShell,&pMe->DeviceInfo);
              rc.dx = pMe->DeviceInfo.cxScreen;
              rc.dy = pMe->DeviceInfo.cyScreen;    
              IDISPLAY_SetClipRect(pMe->a.m_pIDisplay, &rc);
              DBGPRINTF("DeviceInfo: :x(%d), y(%d);", pMe->DeviceInfo.cxScreen, pMe->DeviceInfo.cyScreen);
            }



uint32 HTC_SetAnn(IDisplay    *piDisplay,boolean bValue)
{
    uint32 nErr = SUCCESS;
    const char aszTemp1[] = {'a',':','1'};
    const char aszTemp2[] = {'a',':','0'};
    DBGPRINTF("HTC_SetAnn bValue = %d",bValue);
    if(piDisplay== NULL)
    {
        return EFAILED;
    }
    if(bValue)
    {
        nErr = IDISPLAY_SetPrefs(piDisplay, aszTemp1, 3);
    }
else
    {
        nErr = IDISPLAY_SetPrefs(piDisplay, aszTemp2, 3);
    }
        DBGPRINTF("HTC_SetAnn nErr = %d",nErr);
    return nErr;
}