SHELL - path problem

[geek@02]

Hi.
I tired to enumerate trough all cookie files to get paths to each cookie. I used SHGetPathFromIDList() to retrieve the paths.
The problem is that I receive all the paths, as the cookies are existing on the desktop. It’s something like this:

C: Documant and Settings\username\Desktop\cookie file1.txt
C: Documant and Settings\username\Desktop\cookie file2.txt
C: Documant and Settings\username\Desktop\cookie file3.txt

while the actual path is something like :

C:\Documents and Settings\username\Cookies\cookie file1.txt

So I tried to get to other special folders using flags like CSIDL_COMMON_DOCUMENTS, CSIDL_COMMON_FAVORITES, on SHGetSpecialFolderLocation(). But the same thing happened. The paths says that every file’s are on the desktop.
Why is this?

	
....................
....................
if(SUCCEEDED(::SHGetSpecialFolderLocation(NULL, CSIDL_COOKIES, &pidlCookieF)))
		{
		// fetch the ShellFolder interface of the cookie folder
		CComPtr<IShellFolder> sfiCookieF;
		if(SUCCEEDED(sfiDesktop->BindToObject(
			pidlCookieF, // PIDL to sub folder
			NULL, // must be NULL
			IID_IShellFolder, // just get non-folders
			reinterpret_cast<LPVOID*>(&sfiCookieF)))) // buffer
			{
			// get the enumerator
			CComPtr<IEnumIDList> spenumCookie;
			if(SUCCEEDED(sfiCookieF->EnumObjects(
				NULL, // parent window
				SHCONTF_NONFOLDERS, // just get non-folders
				&spenumCookie))) // buffer
				{   
			// fetch each PIDL
			LPITEMIDLIST pidlCookie = NULL;
			int x=0;
			char cookiePath[MAX_PATH + 1];
			while(spenumCookie->Next(1, &pidlCookie, NULL) == NOERROR)
				{
			
				// ******** file operation ************
				if (SHGetPathFromIDList (pidlCookie, cookiePath)) 
					{
					cookiePath[lstrlen(cookiePath)+1] = '\0';    
					SHFILEOPSTRUCT fopstruct = { 0 };  
					fopstruct.hwnd   = NULL;           
					fopstruct.wFunc  = FO_COPY;        
					fopstruct.fFlags = 0;              
					fopstruct.pFrom  = cookiePath;           
					fopstruct.pTo    = "E:\\cookies\0"; 
					
					BOOL foCheck = SHFileOperation (&fopstruct);
					
					if (foCheck) 
						MessageBox(NULL, "SHFileOperation failed!", NULL, MB_ICONSTOP);
   				     }
.....................
.....................

Thanks.

[anonytmouse]

IEnumIDList::Next Method
The ITEMIDLISTs returned in the rgelt array are relative to the IShellFolder being enumerated.

Like normal paths there are relative and absolute pidls. The desktop folder is the root folder, so when you pass a relative pidl to SHGetPathFromIDList() you get "root\relative path".

So, the question becomes, how to combine two pidls. One way is to use the ILCombine() function to create an absolute pidl before passing it to SHGetPathFromIDList():

LPITEMIDLIST pidlAbsolute = ILCombine(pidlCookieF, pidlCookie);

However, this function, although around since Win95, has only become officially available since Win2000.

Another way is to use GetDisplayNameOf() from the parent folder:

   STRRET strDispName;
   sfiCookieF->GetDisplayNameOf(pidlCookie, SHGDN_NORMAL | SHGDN_FORPARSING, &strDispName);
   StrRetToBuf(&strDispName, pidlCookie, cookiePath,  MAX_PATH);

This page may be useful:
http://netez.com/2xExplorer/shellFAQ/bas_xplore2.html

Alternatively, we can write our own implementation of ILCombine().

DWORD GetPidlSize(LPITEMIDLIST pidl)
{
	DWORD cbSize = 0;

	if (!pidl) return 0;

	// We walk the pidl list to get each element's size...
	while (pidl->mkid.cb != 0)
	{
		cbSize += pidl->mkid.cb;
		pidl = (LPITEMIDLIST) ((LPBYTE) pidl + pidl->mkid.cb);
	}

	// We add space for the two null characters that terminate a pidl...
	return cbSize + 2;
}


LPITEMIDLIST ILCombineImp(LPITEMIDLIST pidlA, LPITEMIDLIST pidlB)
{  // Untested code.

	if (pidlA && pidlB)
	{
		LPITEMIDLIST pidlRet;
		DWORD cbPidlA = GetPidlSize(pidlA) - 2; // Don't include null terminator
		DWORD cbPidlB = GetPidlSize(pidlB);

		if (!(pidlRet = CoTaskMemAlloc(cbPidlA + cbPidlB))) return NULL;

		CopyMemory(pidlRet,                    pidlA, cbPidlA);
		CopyMemory((LPBYTE) pidlRet + cbPidlA, pidlB, cbPidlB);

		return pidlRet;
	}
	else
	{
		return (pidlA ? pidlA : pidlB);
	}
}

[geek@02]

Thanks for the code and the explanation anonytmouse.
But, I'm unclear about ILCombine() - don't understand how it gets an absolute PIDL by combining 2 PIDLs. Somebody please explain a bit more about ILCombine()?

[anonytmouse]

It just combines two pidls, like combining two path strings. For example, if you have the strings, "C:\Cookies\" and "Cookie File 1.txt", combining them will give "C:\Cookies\Cookie File 1.txt" Combining pidls works in the same way.

[geek@02]

I see.
THANKS.