在指定的CDC上画0-9的数字数码管，可以设置颜色、样式、大小、粗细、透明度等属性，可以结合MFC进行二次封装-Designated by the CDC in the 0-9 draw in the number of digital control, you can set the color, style, size, thickness, transparency and other properties, can be combined with a second package MFC