delphi实现无规则半透明窗体，类似侧边栏半透明效果-delphi form realization of a semi-transparent rules, similar to the effect of semi-transparent sidebar

Delphi 仿QQ右下角邮件提示效果，并带有语音提示，支持半透明显示。 -Delphi imitation QQ lower right corner of the message tips, and with voice prompts to support semi transparent display.