VC++实现的窗体淡入淡出效果，窗体的图像是基于BMP格式的，效果看上去比较平滑，有意的朋友研究一下，代码简洁，可以快速整合到你的项目中。-VC++ realized form fade effect, the image of the form is based on the BMP format, and the effect looks smooth, deliberate friends study, the code is simple, and can be quickly inte