Gets a visual style element that represents the pieces that fill a vertical progress bar 获取表示填充垂直进度栏的块的视觉样式元素。
Gets a visual style element that represents the pieces that fill a horizontal progress bar 获取表示填充水平进度栏的块的视觉样式元素。
Gets the width , in pixels , of the space between each inner piece of the progress bar 获取进度栏每个内部格之间的间距的宽度（以像素为单位） 。
Setting the minimum and maximum properties of a progressbar no longer crashes the application -设置一个进度栏的minimum和maximum属性时不再会使应用程序出现故障。
Property to specify the amount that each completed task in an operation changes the value of the progress bar 属性指定操作中每个完成的任务更改进度栏的值的数量。
Gets or sets the time period , in milliseconds , that it takes the progress block to scroll across the progress bar 获取进度块在进度栏内滚动所用的时间段，以毫秒为单位。
You can use a handler for this event to implement a navigation progress bar similar to the one in internet explorer 可以使用该事件的处理程序实现与internet explorer中的导航进度栏类似的导航进度栏。
