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;}