一、TRegIniFile方法：(特点：操作简单，可用于Win95/98 Window NT)
首先，在源文件(cpp)中加入
#include $#@60;vcl\registry.hpp$#@62; //for C++ Builder 3.0

__fastcall TForm1::TForm1(TComponent* Owner): TForm(Owner)
{ // 当Form1打开时，从注册表读入Left值

TRegIniFile *pIni = new TRegIniFile("SOFTWARE\\MyName\\MyProg");
Left = pIni-$#@62;ReadInteger("Config","Left",200);
delete pIni;

}

void __fastcall TForm1::FormClose(TObject *Sender,TCloseAction &Action)

{ // 当Form1关闭时，往注册表存放Left值

TRegIniFile *pIni = new TRegIniFile("SOFTWARE\\MyName\\MyProg"); pIni-$#@62;WriteInteger("Config","Left",Left);
delete pIni;

}

注：在缺省状态下，信息存放HKEY_CURRENT_USER根目录下。实际上，它代替了Windows 3.1中的Ini文件.若存放在其它根目录下，可设置Registry-$#@62;RootKey,例：

Registry-$#@62;RootKey ＝ HKEY_LOCAL_MACHINE;

除了可以存放整型值，还可以存放字符串值和布尔值。

二、如何操作注册表

#include $#@60;Registry.hpp$#@62;

TRegIniFile *R=new TRegIniFile("SOFTWARE\\ahaos Softwares\\Wenku\\Config");

//读：
Edit2-$#@62;Text=R-$#@62;ReadString("SMTP","Host","");
Edit3-$#@62;Text=IntToStr(R-$#@62;ReadInteger("SMTP","Port",25));
Edit4-$#@62;Text=R-$#@62;ReadString("SMTP","UserID","");

//写：
R-$#@62;WriteString("SMTP","Host",Edit2-$#@62;Text);
R-$#@62;WriteInteger("SMTP","Port",StrToInt(Edit3-$#@62;Text));
R-$#@62;WriteString("SMTP","UserID",Edit4-$#@62;Text);

别忘了 R-$#@62;Free();