public static IShellFolder GetFolderImpl(this IntPtr pidl,
ref PidlFolderData data, SBSP wFlags)
{
IShellFolder result = null;
int hr = 0;
IntPtr pidlTmp = IntPtr.Zero;
var folderTmp = data.folderTmp;
var currentAbsolutePidl = data.currentAbsolutePidl;
var folderTmpPtr = data.folderTmpPtr;
var currentFolder = data.currentFolder;
IShellFolder desktopFolder = PidlFolderData.DesktopFolder;
var desktopFolderPidl = PidlFolderData.DesktopFolderPidl;
// Check to see if we have a desktop pidl, relative pidl or absolite pidl.
if (Shell32.ILIsEqual(pidl, desktopFolderPidl))
{
// The provided PIDL is the desktop folder.
pidlTmp = Shell32.ILClone(desktopFolderPidl);
folderTmp = desktopFolder;
}
else if ((wFlags & SBSP.SBSP_RELATIVE) != 0)
{
// SBSP_RELATIVE - pidl is relative from the current folder
if ((hr = currentFolder.BindToObject(pidl, IntPtr.Zero,
ref Shell32.IID_IShellFolder,
out folderTmpPtr)) != WinError.S_OK)
{
return(result); // hr;
}
pidlTmp = Shell32.ILCombine(currentAbsolutePidl, pidl);
folderTmp = (IShellFolder)Marshal.GetObjectForIUnknown(folderTmpPtr);
}
else
{
// SBSP_ABSOLUTE - pidl is an absolute pidl (relative from desktop)
PidlClone pidlClone = PidlClone.Of(pidl);
folderTmp = GetPidlCloneFolder(pidlClone);
pidlTmp = pidlClone.Handle;
}
if (folderTmp == null)
{
Shell32.ILFree(pidlTmp);
return(result); // WinError.E_FAIL;
}
result = folderTmp;
return(result);
}
