滚动块

• Draws a right - pointing track bar slider also known as the thumb with visual styles
  以视觉样式绘制一个指向右方的跟踪条滑块（又称滚动块） 。
• Draws an upward - pointing track bar slider also known as the thumb with visual styles
  以视觉样式绘制一个指向上方的跟踪条滑块（又称滚动块） 。
• Draws a downward - pointing track bar slider also known as the thumb with visual styles
  以视觉样式绘制一个指向下方的跟踪条滑块（又称滚动块） 。
• For the grip of a vertical scroll box also known as the thumb
  Visualstyleelement . scrollbar . grippervertical成员为垂直滚动框也称为滚动块的手柄提供
• For this reason , the thumb is " springloaded " and always remains in the center of the scrollbar
  为此，滚动块就像“装了弹簧” ，总是保持在滚动条的中心。
• The scroll boxes inside the scroll bar indicate your vertical and horizontal location in the document
  滚动条内的滚动块指示出你在文件中的垂直和水平位置。
• For the grip of a horizontal scroll box also known as the thumb
  Visualstyleelement . scrollbar . gripperhorizontal成员为水平滚动框也称为滚动块的手柄提供
• Returns the size , in pixels , of the track bar slider also known as the thumb that points up
  返回指向上方的跟踪条滑块（又称滚动块）的大小，以像素为单位。
• Returns the size , in pixels , of the track bar slider also known as the thumb that points down
  返回指向下方的跟踪条滑块（又称滚动块）的大小，以像素为单位。
• To page up move to a lower memory address , click the vertical scrollbar above the thumb
  若要向上翻页（移动到较低的内存地址） ，请单击滚动块上方的垂直滚动条。