利用VC实现了字幕滚动功能，并利用双缓冲技术解决闪烁问题-VC enables the use of subtitles scrolling function, and use double-buffering technology to solve flicker problems

继承于vc中的static控件，实现滚动字幕的效果，并且可以改变控件上的文本的字体颜色 -Inheritance of static control in vc, to achieve the effect of rolling subtitles, and can change the control text font color on

用static控件显示上下滚动的字幕，像电视剧结束时出现的谢幕人员表，并设置背景图片轮换。-Scroll up and down with the static control to display subtitles, like the drama end of the curtain call staff table, and set the background image rotation.