track bar

• Objects for each state of the right - pointing track bar slider also known as the thumb
  为向右跟踪条滑块（又称滚动块）的每种状态提供
• Gets or sets a value indicating how to display the tick marks on the track bar
  获取或设置一个值，该值指示如何显示跟踪条上的刻度线。
• An example use of a track bar would be for setting cursor blink rate or mouse speed
  使用跟踪条的一个示例是设置光标闪烁频率或鼠标速度。
• Objects for each state of the downward - pointing track bar slider also known as the thumb
  为向下跟踪条滑块（也称为滚动块）的每种状态提供
• Draws a left - pointing track bar slider also known as the thumb with visual styles
  以视觉样式绘制一个指向左方的跟踪条滑块（又称滚动块） 。
• 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） 。
• Gets a visual style element that represents a left - pointing track bar slider that has focus
  获取表示有焦点的向左跟踪条滑块的视觉样式元素。
• 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） 。
• Gets a visual style element that represents a right - pointing track bar slider that has focus
  获取表示有焦点的向右跟踪条滑块的视觉样式元素。
• 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） 。