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📁 好书啊!很好哦
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<title>将主机名解析成IP地址                              </title>
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      <td width="621"><a href="http://www.CoDelphi.com"><img src="images/logo.gif" border="0" width="153" height="60"><img src="images/bigbanner.gif" border="0" width="468" height="60"></a></td>
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      <div align="center" class="btitle">将主机名解析成IP地址                              <br>
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      <div align="center"><strong>Lutfi&nbspBaran                                   </strong></div>
       
      <b><br>
      　摘　要</b>：描述一个将主机名解释成IP地址的函数                <br>
      <b>　关键字</b>：IP&nbspNumbers&nbsp主机                            <br>
      <b>　类　别</b>：网络                                               
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      <span class="content"><br>在use子句声明Winsock <br>............<br>function HostToIP(Name: string; var Ip: string): Boolean;<br>var<br>&nbsp;&nbsp;wsdata : TWSAData;<br>&nbsp;&nbsp;hostName : array [0..255] of char;<br>&nbsp;&nbsp;hostEnt : PHostEnt;<br>&nbsp;&nbsp;addr : PChar;<br>begin<br>&nbsp;&nbsp;WSAStartup ($0101, wsdata);<br>&nbsp;&nbsp;try<br>&nbsp;&nbsp;&nbsp;&nbsp;gethostname (hostName, sizeof (hostName));<br>&nbsp;&nbsp;&nbsp;&nbsp;StrPCopy(hostName, Name);<br>&nbsp;&nbsp;&nbsp;&nbsp;hostEnt := gethostbyname (hostName);<br>&nbsp;&nbsp;&nbsp;&nbsp;if Assigned (hostEnt) then<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if Assigned (hostEnt^.h_addr_list) then begin<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;addr := hostEnt^.h_addr_list^;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if Assigned (addr) then begin<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IP := Format ('%d.%d.%d.%d', [byte (addr [0]),<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;byte (addr [1]), byte (addr [2]), byte (addr [3])]);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Result := True;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Result := False;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Result := False<br>&nbsp;&nbsp;&nbsp;&nbsp;else begin<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Result := False;<br>&nbsp;&nbsp;&nbsp;&nbsp;end;<br>&nbsp;&nbsp;finally<br>&nbsp;&nbsp;&nbsp;&nbsp;WSACleanup;<br>&nbsp;&nbsp;end<br>end;<br>................................<br>你可以这样试用这个功能：在form上放置EditBox、一个按钮和一个标签，在把代码加到按钮的OnClick事件上<br><br>procedure TForm1.Button1Click(Sender: TObject);<br>var<br>IP: string;<br>begin<br>if HostToIp(Edit1.Text, IP) then Label1.Caption := IP;<br>end;</span> 
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  中文开发在线<a href="http://www.codelphi.com" target="_blank">www.codelphi.com</a>授权使用。
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