vertical scrolling

• 垂直滚动

vertical scrolling的用法和样例：

例句

1. Display a vertical scroll bar only when text is longer than the height of the control.
   仅在文本比控件的高度长时显示垂直滚动条。
2. This example shows how to use horizontal and vertical scroll bar controls to scroll across and down an image on a form.
   此示例演示如何使用水平和垂直滚动条控件来横向和向下滚动窗体上的图像。