大家在有些时候希望自己做的控件是半透明或透明的，就像半透明的窗体一样，我经过一段时间的查询，发现这个是可以实现，我们来看看它的实现以及带来的一些问题吧。-Sometimes you want to do is control translucent or transparent, translucent windows like, I spent some time in and found that this can be achieved, we look at it and the rea