一个官方例子，基于emwin图形界面的滚动条实现代码，有透明图层和emwin定时器的实现-An official example, based on the EMWIN graphical interface to achieve the scroll bar code, a transparent layer and EMWIN timer

STemWin无操作1.5listview可自由添加滚动条宽度-STemWin no operation 1.5listview can freely add the scroll bar width