自定义半透明遮罩层,很漂亮的效果，方便直观。-Custom translucent layer mask

C# winform 加载动画，半透明遮罩效果。(C # winform loading animation, translucent mask effect.)

半透明遮照层，在网页跳转或者进程过渡时提供一个遮照层，也可防止过程中其他操作(A translucent mask that provides a mask when a web page jumps or processes transition, and prevents other operations in the process)