敬业的IT人 >> 编程开发 >> C++Builder >> 利用Windows注册表存储信息

利用Windows注册表存储信息

敬业的IT人 互联网 佚名 2008-1-3 21:02:05


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 <vcl\registry.hpp> //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->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->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Windows3.1中的Ini文件.若存放在其它根目录下,可设置Registry->RootKey,例:

Registry->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 <Registry.hpp>

TRegIniFile *R=new TRegIniFile("SOFTWARE\\ahao''s Softwares\\Wenku\\Config");

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

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

别忘了 R->Free(); 

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