自绘的滑块控件。显示进度等信息。。汽车仪表-Since the painting of the slider control. Display progress and other information. . Auto Meter

MFC当中ScrollBar的经典实例，有三个滚动滑块分别控制红绿蓝三个颜色0~255，并在编辑框中实时显示红绿蓝的数值，并且将混合色在对话框中以矩形方式显示出来，对初学者非常有用。-Among the classic examples of MFC ScrollBar, there are three sliders control the scrolling of the three colors red, green and blue from 0 to 255, and the real