Bar Button Type 枚举
public enum class ScrollBarButtonType
public enum ScrollBarButtonType
type ScrollBarButtonType =
Public Enum ScrollBarButtonType
通过单击滚动条块下方区域的垂直滚动条，或其左侧的水平滚动条，可大幅度缩小滚动视图。The scroll view was decreased by a large decrement, by clicking the area beneath a scrolling thumb for a vertical scrollbar, or to the left of a scrolling thumb for a horizontal scrollbar.
通过单击滚动条块上方区域的垂直滚动条，或其右侧的水平滚动条，可大幅度扩大滚动视图。The scroll view was increased by a large increment, by clicking the area above a scrolling thumb for a vertical scrollbar, or to the right of a scrolling thumb for a horizontal scrollbar.
单击向下或向左箭头按钮可小幅度缩小滚动视图。A down or left arrow button was clicked to decrease the scroll view by a small decrement.
单击向上或向右箭头按钮可小幅度扩大滚动视图。An up or right arrow button was clicked to increase the scroll view by a small increment.
单击了跟踪器按钮（也称为滚动条块）。The tracker button (also known as the scrollbar thumb) was clicked.
单击缩放或重置按钮。The zoom or reset button was clicked.
ScrollBarButtonType 枚举ButtonType与属性一起使用, 并允许开发人员确定最终用户单击的滚动条按钮的类型。The ScrollBarButtonType enumeration is used with the ButtonType property, and allows the developer to determine what type of scrollbar button the end-user clicked on.