说明：  一个更好的ToolTips实现方法，效率更高，方法更加标准。和4月27日的提供的ToolTips相比，今天提供的方法是和VB,DELPHI,VC内部实现的机制一样，4月27日提供的程序可以从中学习许多编程技巧，可以改为其它用途
(ToolTips a better method, more efficient and more standard methods. And on April 27 of the ToolTips than today provides a method and VB, Delphi, VC internal mechanism to achieve the same on April 27 for the procedure can learn many programming skills, can be changed into other uses)