这个程序中包含多种位图按钮，适合学习界面按钮的设计，程序也并不复杂，相信很容易看懂的-The program includes a variety of bitmap button, the button interface is suitable to study the design, the procedures are not complicated, I believe that is easy to understand the

小计算器程序，可以发出声音的，很简单，容易学习。-Small calculator program, you can make a sound, a very simple, easy to learn.

一个学习邮件编程的好例子,简洁易懂,很容易将其剥离出来()