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<HTML><HEAD><TITLE>利用Windows注册表存储信息</TITLE>

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<p align="center"><b><font size="4">利用Windows注册表存储信息</font></b> <BR>&nbsp; 

<P>一、TRegIniFile方法：(特点：操作简单，可用于Win95/98 Window NT) <BR>&nbsp;&nbsp;&nbsp;  

首先，在源文件(cpp)中加入  

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; #include  

&lt;vcl\registry.hpp&gt; //for C++ Builder 3.0  

<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; __fastcall  

TForm1::TForm1(TComponent* Owner): TForm(Owner)  

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  

{&nbsp;&nbsp; // 当Form1打开时，从注册表读入Left值  

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  

TRegIniFile *pIni = new TRegIniFile("SOFTWARE\\MyName\\MyProg");  

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  

Left = pIni-&gt;ReadInteger("Config","Left",200);  

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  

delete pIni;  

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }  

<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; void  

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

<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  

{&nbsp;&nbsp; // 当Form1关闭时，往注册表存放Left值  

<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  

TRegIniFile *pIni = new TRegIniFile("SOFTWARE\\MyName\\MyProg");  

<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  

pIni-&gt;WriteInteger("Config","Left",Left);  

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  

delete pIni;  

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }  

<P>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-&gt;RootKey,例：  

<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  

Registry-&gt;RootKey ＝ HKEY_LOCAL_MACHINE;  

<P>除了可以存放整型值，还可以存放字符串值和布尔值。  

<P>二、如何操作注册表  

<P>#include &lt;Registry.hpp&gt;  

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

<P>//读： <BR>Edit2-&gt;Text=R-&gt;ReadString("SMTP","Host","");  

<BR>Edit3-&gt;Text=IntToStr(R-&gt;ReadInteger("SMTP","Port",25));  

<BR>Edit4-&gt;Text=R-&gt;ReadString("SMTP","UserID","");  

<P>//写： <BR>R-&gt;WriteString("SMTP","Host",Edit2-&gt;Text);  

<BR>R-&gt;WriteInteger("SMTP","Port",StrToInt(Edit3-&gt;Text));  

<BR>R-&gt;WriteString("SMTP","UserID",Edit4-&gt;Text);  

<P>别忘了 R-&gt;Free(); <BR>&nbsp; </P></BODY></HTML>
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