教学＂求圆的面积和圆的周长＂的程序，给学生作为一个简单的例子讲解．...

zlib的文件压缩演示-zlib compression in the paper demonstrate ........................ RECOMMENDATIONS

DLL的动态调用-DLL s dynamic calling

自动适应简繁体的TBitbtn按钮,并有类似XP风格的外观-Automatically adapt to the simplified and traditional TBitbtn button, and a similar appearance of XP-style

Delphi编程 自己绘制Pagecontrol控件-Delphi Pagecontrol

这是一个很好的功能.可以获取到某个文件的一些很好的有用的信息.

一个用Delphi编制的遗传算法程序，依据差异进化的原理实现最优化。-GA source codes programmed with Delphi.

一个日历编辑框空间，去掉了对Raize控件的依赖，加入针对年月日的上下左右键操作，加入年月日的范围校验。-A calendar edit box space, eliminating dependence on Raize controls, by adding the response to date about key operation from top to bottom, by adding the scope of check date.

查询某网址是否正确，是否真有该网址，如果没有则显示不能解析主机名-Query a Web site is correct, it really has the web site, if there is no show that can not resolve host names

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数字输入控件，可指定整数位和小数位的长度，可指定是否允许负值。 需要SuiEdit控件支持，如果没有，可修改源码从TCustomEdit继承，并去掉其没有的属性及相关方法即可。-digital input control, to designate places and rounded the length of decimal places, to designate whether to allow negative. SuiEdit controls need support, and if not, can modify the source codes from TCustomEdit inheritance, it is not removed and the properties and related methods can be.