如何获得系统最上面“选项”和“退出”按钮的高度与长度

怎么获得系统最下面“选项”和“退出”按钮的高度与长度？
怎么获得系统最下面“选项”和“退出”按钮的高度与长度？
------解决方案--------------------------------------------------------
AknLayoutUtils::LayoutMetricsRect (TAknLayoutMetrics aParam, TRect &aRect);
AknLayoutUtils::LayoutMetricsSize (TAknLayoutMetrics aParam, TSize &aSize);


enum TAknLayoutMetrics

    {

    EScreen,

    EApplicationWindow,

    EStatusPane,

    EStatusPaneSecondary,     // Deprecated, do not use

    EMainPane,

    EControlPane,

    EControlPaneSecondary,    // Deprecated, do not use

    ESignalPane,

    EContextPane,

    ETitlePane,

    EBatteryPane,

    EUniversalIndicatorPane,

    ENaviPane,

    EFindPane,

    EWallpaperPane,

    EIndicatorPane,

    EAColunm,

    EBColunm,

    ECColunm,

    EDColunm,

    EStaconTop,                                       // landscape

    EStaconBottom,                                    // landscape

    EStatusPaneBottom = EStatusPaneSecondary,         // landscape

    EControlPaneBottom = EControlPaneSecondary,       // landscape

    EControlPaneTop = EControlPane,                   // landscape

    EStatusPaneTop = EStatusPane                      // landscape

    };