该控件为MFC开发的Active控件。主要属性是标志开关的布尔量。当为true时，表示滚动条滚动；当为false时，表示计算结束，停止滚动-The control of Active Control for MFC developers. The main attribute is a Boolean flag switches. When true, that scroll bar scroll as is false, that he calculated the end, stop ro