我们经常在AboutBox中显示一幅关于公司或自己讯息的位图，有没有想过让这幅位图有更酷的效果？比如加上淡入淡出效果？只要有了这个CAlphaCtrl控件就可以轻松实现。-We often display a picture on the company or its own message in AboutBox, it is not thought that the bitmap has a more cool effect? For example, with a fade effect?