axMapControl1.MousePointer = esriControlsMousePointer.esriPointerHourglass;是什么意义

axMapControl1.MousePointer = esriControlsMousePointer.esriPointerHourglass;是什么意思

 System.Windows.Forms.OpenFileDialog openFileDia = new OpenFileDialog();
            openFileDia.Title = "打开地图文档";
            openFileDia.Filter = "mxd文档(*.mxd)|*.mxd|所有文件|*.*";
            openFileDia.ShowDialog();
            string strPath = openFileDia.FileName;
            if (axMapControl1.CheckMxFile(strPath))
            {
                axMapControl1.MousePointer = esriControlsMousePointer.esriPointerHourglass;
                axMapControl1.LoadMxFile(strPath ,0,Type.Missing);
                axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;
            }

这里的

axMapControl1.MousePointer = esriControlsMousePointer.esriPointerHourglass;
                axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;

这两句起什么作用
还有对象模型图中也有好多这个，不太明白，哪位能赐教一下
------解决思路----------------------
是枚举，主要是用来进行标志程序执行的标志位的。