一个真正的多窗口的图形界面系统，支持鼠标和各种控件，用tc2.0就可以编译通过。编译的时候用tc2.0打开gui.prj然后build就行。

we’ve successfully developed a simple GUI interface, using only a few lines of code. The major factor which works here is the entire class structure is re-usable, and can be applied to build a lot of other different User Interfaces too. The reader c