video driver的用法和样例：
例句
- Use this method to force the video driver to discard objects in the managed pool from video memory.
使用此方法可强制视频驱动程序丢弃视频内存的托管池中的对象。 - The width of the vertical scroll bar and the height of the horizontal scroll bar are constant for a particular video driver and display resolution.
垂直滚动条的宽度和水平滚动条的高度对于特殊的视频驱动程序和显示分辨率来说是常量。
