可以找描出系统可用的串口，包括用USB扩展的

进度条显示,初学者学Delphi的源码,进度条显示,初学者学Delphi的源码 -Progress bar shows that beginners learn Delphi source code, the progress bar shows that beginners learn Delphi source code

delphi下显示与控制树形结构的代码，功能比较简单，可以再完善-delphi tree structure under the display and control of code, function relatively simple and can be improved

图书管理系统，小的图书管理系统！内含对数据库的简单操作。-Library management system, small library management system! The database contains a simple operation.

滚动下拉框－不过下拉的是树型结构，自己使用的，可以添加方法和属性。-rolling drop-down box- but the drop-down tree structure, for its own use, can add methods and attributes.

已经修改的屏幕抓词代码，可以自动获取屏幕制定位置的文本。-no need move mouse, capture screen text

注册/反注册OCX,DLL的例子-registration/anti-registered OCX, DLL example

串口控件 串口控件 串口控件 串口控件 串口控件-comm

示范如何制作 VCL 构件的属性值编辑器-demonstration on how to make a VCL component attribute values Editor

繁简转换控件属性:Mode:(GBtoBig,BigtoGb)GbtoBig:进行简繁转换；BigtoGb:进行繁简转换；方法:SetString(ss:string)返回字符串ss的转换结果(返回繁,简体视mode设定而确定).-simplified change control attributes : Mode : (GBtoBig, BigtoGb) GbtoBig : for signpost; BigtoGb : for simplified conversion; Methods : SetString (ss : string) returns a string ss conversion results (to return to traditional and simplified characters, as defined set mode).

一个delphi的p2p控件的源代码，可惜没有例子-a p2p control of the source code, but no examples