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<TITLE>Shell Programming - Creating File Links</TITLE>
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<!-- Article Title -->Creating File Links
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This article was contributed by <!-- Author Email --><A HREF="mailto:M.Taupitz@t-online.de"><!-- Author Name -->Michael Taupitz</A>.
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For a new Project I needed the function, to create Links to a File (in
Startmenu and Autostart).
But that is the Point to take a look on the MFC-Classes. But there is
not so many Info about.
The Old-Version (for Win 3.11) with DDE was nice and runs fine. But that
is not the way to
write it under WinNT 4.0.
<p>Okay, the right book at the right time, and every problem can be
solved...
<p>The Solution I found under a small chapter about IShellLink. But not much
Info, and so i tried
it out.
<p>At First is the boring COM -
<!-- start a block of source code -->
<PRE><TT><FONT COLOR="#990000">
CoInitialize(NULL);
hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER,
IID_IShellLink, (LPVOID*) &psl);
<!-- end the block of source code -->
</FONT></TT></PRE>
<p>If it was successful, you can set Path, Description and so on.
But to create the link in real (on Harddisk) we need IPersistFile
<PRE><TT><FONT COLOR="#990000">
hres = psl->QueryInterface( IID_IPersistFile, (LPVOID *) &ppf);
</FONT></TT></PRE>
<p>and save the File...
<PRE><TT><FONT COLOR="#990000">
hres = ppf->Save(<LinkPath in WideChar>, TRUE);
</FONT></TT></PRE>
<p>Thats all.
<p>So, if anybody need it complete:
<PRE><TT><FONT COLOR="#990000">
// Creating a Link with IShellLink
// strPathObj = Object with Path
// strPathLink = Path where the Link will appear
// strDesc = Link-Decription (the text under the Icon)
// CoInitialize(NULL) wird vorausgesetzt !!
HRESULT MyMainClass::CreateLink(const CString strPathObj,const CString
strPathLink, const CString strDesc)
{
HRESULT hres;
IShellLink* psl;
CString strMyPath = strPathLink;
hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER,
IID_IShellLink, (LPVOID*) &psl);
if (SUCCEEDED(hres))
{
IPersistFile* ppf;
psl->SetPath(strPathObj);
psl->SetDescription(strDesc);
hres = psl->QueryInterface( IID_IPersistFile, (LPVOID *) &ppf);
if (SUCCEEDED(hres))
{
strMyPath += ".lnk"; // Important !!!
WORD wsz[MAX_PATH];
MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, strMyPath, -1, wsz,
MAX_PATH);
hres = ppf->Save(wsz, TRUE);
if (hres != S_OK )
MessageBox(NULL, "IPersistFile->Save() Error", "Error", MB_OK);
ppf->Release();
}
psl->Release();
}
return hres;
}
</FONT></TT></PRE>
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<p>Date Posted: 10/5/98<!-- date here -->
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