文档详细介绍了vc环境下如果实现透明位图，原理阐述清晰，每一步都有图说明。本人就是看了这个文档才真正搞明白的，以前因为没有图片一直不清楚中间过程效果-The document details the vc environment transparent bitmap clear principle explained every step of the figure illustrates. I looked at is this document really thoroughly under