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<title>创建快捷方式</title>

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<h3 align="center">用BCB在windows桌面创建快捷方式<br>

</h3>

<p>API提供了一个叫做IShellLink的COM接口允许我们创建快捷方式。为在桌面创建快捷方式,我们创建一个IShellLink对象,设置它的属性,然后把这个link保存到desktop目录。</p>

<p>下面的例子代码演示了怎样创建一个快捷方式。在这个例子里,这个快捷方式保存在C:\Drive目录下。</p>

<pre><font color="navy" size="4">//----------------------------------------------------------------------</font>

<font size="4">include &lt;shlobj.h&gt;</font>

&nbsp;

<font size="4"><b>void __fastcall</b> TForm1::Button1Click(TObject *Sender)</font>

<font size="4">{</font>

<font size="4">    <b>if</b>(OpenDialog1-&gt;Execute())</font>

<font size="4">        CreateShortCut(OpenDialog1-&gt;FileName);</font>

<font size="4">}</font>

<font color="navy" size="4">//----------------------------------------------------------------------</font>

<font size="4">void TForm1::CreateShortCut(const AnsiString &amp;file)</font>

<font size="4">{</font>

<font size="4">    IShellLink* pLink;</font>

<font size="4">    IPersistFile* pPersistFile;</font>

<font size="4">    <b>if</b>(SUCCEEDED(CoInitialize(NULL)))</font>

<font size="4">    {</font>

<font size="4">        <b>if</b>(SUCCEEDED(CoCreateInstance(CLSID_ShellLink, NULL,</font>

<font size="4">                                      CLSCTX_INPROC_SERVER,</font>

<font size="4">                                      IID_IShellLink, (void **) &amp;pLink)))</font>

<font size="4">        {</font>

<font size="4">            pLink-&gt;SetPath(file.c_str());</font>

<font size="4">            pLink-&gt;SetDescription(&quot;Woo hoo, look at Homer's shortcut&quot;);</font>

<font size="4">            pLink-&gt;SetShowCmd(SW_SHOW);</font>

<font size="4">            <b>if</b>(SUCCEEDED(pLink-&gt;QueryInterface(IID_IPersistFile,</font>

<font size="4">                                               (void **)&amp;pPersistFile)))</font>

<font size="4">            {</font>

<font size="4">                WideString strShortCutLocation(&quot;C:\\bcbshortcut.lnk&quot;);</font>

<font size="4">                pPersistFile-&gt;Save(strShortCutLocation.c_bstr(), TRUE);</font>

<font size="4">                pPersistFile-&gt;Release();</font>

<font size="4">            }</font>

<font size="4">            pLink-&gt;Release();</font>

<font size="4">        }</font>

&nbsp;

<font size="4">        CoUninitialize();</font>

<font size="4">    }</font>

<font size="4">}</font>

<font color="navy" size="4">//----------------------------------------------------------------------</font></pre>

<p><font size="4">上面的例子只是把快捷方式文件保存到了c:\drive目录下,但没保存到desktop目录下。</font></p>

<p><font size="4">要让快捷方式出现在桌面上,只须把快捷方式文件保存到desktop目录下。首先我们要找到windows的desktop目录,请参阅<b><a >判断windows的Desktop及相关目录</a></b>这一节。一旦我们知道了desktop所在的目录,我们就能将快捷方式文件保存到desktop目录下。然后windows就能将快捷方式图标显示到桌面上。下面是经过改进了的例子:</font></p>

<pre><font color="navy" size="4">//----------------------------------------------------------------------</font>

<font size="4"><b>void</b> TForm1::CreateShortCut(const AnsiString &amp;file)</font>

<font size="4">{</font>

<font size="4">    IShellLink* pLink;</font>

<font size="4">    IPersistFile* pPersistFile;</font>

<font size="4">    LPMALLOC      ShellMalloc;</font>

<font size="4">    LPITEMIDLIST  DesktopPidl;</font>

<font size="4">    <b>char</b> DesktopDir[MAX_PATH];</font>

&nbsp;

<font size="4">    <b>if</b>(FAILED(SHGetMalloc(&amp;ShellMalloc)))</font>

<font size="4">        return;</font>

&nbsp;

<font size="4">    <b>if</b>(FAILED(SHGetSpecialFolderLocation(NULL,</font>

<font size="4">                                         CSIDL_DESKTOPDIRECTORY,</font>

<font size="4">                                         &amp;DesktopPidl)))</font>

<font size="4">        <b>return</b>;</font>

&nbsp;

<font size="4">    <b>if</b>(!SHGetPathFromIDList(DesktopPidl, DesktopDir))</font>

<font size="4">    {</font>

<font size="4">        ShellMalloc-&gt;Free(DesktopPidl);</font>

<font size="4">        ShellMalloc-&gt;Release();</font>

<font size="4">        <b>return</b>;</font>

<font size="4">    }</font>

&nbsp;

<font size="4">    ShellMalloc-&gt;Free(DesktopPidl);</font>

<font size="4">    ShellMalloc-&gt;Release();</font>

<font size="4">                                               </font>

<font size="4">    <b>if</b>(SUCCEEDED(CoInitialize(NULL)))</font>

<font size="4">    {</font>

<font size="4">        <b>if</b>(SUCCEEDED(CoCreateInstance(CLSID_ShellLink, NULL,</font>

<font size="4">                                      CLSCTX_INPROC_SERVER,</font>

<font size="4">                                      IID_IShellLink, (void **) &amp;pLink)))</font>

<font size="4">        {</font>

<font size="4">            pLink-&gt;SetPath(file.c_str());</font>

<font size="4">            pLink-&gt;SetDescription(&quot;Woo hoo, look at Homer's shortcut&quot;);</font>

<font size="4">            pLink-&gt;SetShowCmd(SW_SHOW);</font>

&nbsp;

<font size="4">            <b>if</b>(SUCCEEDED(pLink-&gt;QueryInterface(IID_IPersistFile,</font>

<font size="4">                                               (void **)&amp;pPersistFile)))</font>

<font size="4">            {</font>

&nbsp;

<font size="4">                WideString strShortCutLocation(DesktopDir);</font>

<font size="4">                strShortCutLocation += &quot;\\bcbshortcut.lnk&quot;;</font>

<font size="4">                pPersistFile-&gt;Save(strShortCutLocation.c_bstr(), TRUE);</font>

<font size="4">                pPersistFile-&gt;Release();</font>

<font size="4">            }</font>

<font size="4">            pLink-&gt;Release();</font>

<font size="4">        }</font>

<font size="4">        CoUninitialize();</font>

<font size="4">    }</font>

<font size="4">}</font>

<font color="navy" size="4">//----------------------------------------------------------------------</font></pre>

<h3><font size="4">不要陷于COM的泥沼之中</font></h3>

<p><font size="4">创建快捷方式包括一些对COM的使用。不要让你陷入到COM的复杂之中。COM只是创建和使用对象的一种方法。在这个例子里我们可以考虑不使用COM而是用等价的C++技术。</font></p>

<pre><font size="4"><b>COM code</b>                                   <b>C++ psuedo-equivalent</b></font>

<font size="4">IShellLink*   pLink;                       TShellLink   *Link;</font>

<font size="4">IPersistFile* pPersistFile;                TPersistFile *PersistFile;</font>

&nbsp;

<font size="4">CoInitialize();</font>

&nbsp;

<font size="4">                                           </font>

<font size="4">CoCreateInstance(CLSID_ShellLink,          Link = new TShellLink;</font>

<font size="4">                 NULL,</font>

<font size="4">                 CLSCTX_INPROC_SERVER,</font>

<font size="4">                 IID_IShellLink,</font>

<font size="4">                 (void **) &amp;pLink)</font>

&nbsp;

<font size="4">                                           </font>

<font size="4">pLink-&gt;SetPath(file.c_str());              Link-&gt;SetPath(file.c_str());</font>

<font size="4">pLink-&gt;SetShowCmd(SW_SHOW);                Link-&gt;SetShowCmd(SW_SHOW);</font>

&nbsp;

&nbsp;

<font size="4">                                           </font>

<font size="4">pLink-&gt;QueryInterface(IID_IPersistFile     PersistFile =</font>

<font size="4">               (void **)&amp;pPersistFile)))      dynamic_cast&lt;TPersistFile*&gt;(Link);</font>

&nbsp;

<font size="4">pPersistFile-&gt;Save(&quot;C:\\&quot;, TRUE);          PersistFile-&gt;Save(&quot;C:\\&quot;);</font>

&nbsp;

&nbsp;

<font size="4">                                           </font>

<font size="4">pPersistFile-&gt;Release();                   delete PersistFile</font>

<font size="4">pLink-&gt;Release();                          delete Link;</font>

&nbsp;

<font size="4">CoUninitialize();</font></pre>

<p>&nbsp;</p>



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