设计界面窗口透明，可设置界面的透明度，是一个很好的例子(This is a good example of the transparency of the design interface window and the transparency of the interface)

api 透明效果,程序非常简单,功能是将菜单透明化,可实现选择透明度()

两个PNGButton类，一个继承与CWnd，一个继承与CButton。实现按钮透明，即按钮上的图片是可有透明度的，方便不规则图形的显示，并且可给鼠标悬停、点击等操作赋予不同的图片(There are two PNGButton classes, one is inheritance and CWnd, one is inheritance and the other is CButton. The realization button is transparent, that is, the