说明：  操作内存DC一直都很麻烦,此类模块将这些都封装了起来,用法简单,例子中很详细. 可以创建DC,载入图像,获取其他DC中的图像,贴图,写字,设置字体\颜色等,功能齐全,原创!
(Operation of the memory DC has been very troublesome, such modules are packaged these up and use simple examples in detail. Can create a DC, load images, to obtain additional DC in the images, mapping, writing, set the font \ color and so on, full-featured, originality!)