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<title>利用Windows注册表存储信息</title>

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      <div align="center" class="p14"><font color="#000000">利用Windows注册表存储信息</font></div>

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      <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> 

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