自绘的滚动条控件，使用时很简单，使用提供的接口，然后根据需要更换滚动条的图片-Since the painting of the scroll bar control, use very simple, using the provided interface, and then scroll the picture needs to be replaced

vc如何以静态文本框为基类，自绘漂亮的滚动条控件-vc how to static text box as the base class, since the painting beautiful scroll bar control